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Yu MKL, Chan SHS, Leung D, Cheng S, Tsang LCH, Kwan TC, Zhang K, Wang X, Tu W, Peiris M, Lau YL, Rosa Duque JS. Medium-term immunogenicity of three doses of BNT162b2 and CoronaVac in Hong Kong neuromuscular disease patients. Hum Vaccin Immunother 2024; 20:2424615. [PMID: 39539036 PMCID: PMC11572069 DOI: 10.1080/21645515.2024.2424615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 10/22/2024] [Accepted: 10/29/2024] [Indexed: 11/16/2024] Open
Abstract
The durability of the immunogenicity elicited by three doses of mRNA-based BNT162b2 and whole-virus inactivated CoronaVac in patients with neuromuscular diseases, particularly those on immunosuppressive drugs and variants of concern, has not been well-established. Our goal was to evaluate medium-term humoral immunogenicity outcomes after 3 doses of these vaccines. Peripheral blood samples were collected from participants 14-49 days and 155-210 days after administration of the third vaccine dose to assess humoral immune responses through serological assays. The immunogenicity outcomes of each patient were compared to those of three age-matched healthy control participants, ensuring a balanced comparison. Both patients that received 3 doses of BNT162b2 and 10 (90.9%) patients that received CoronaVac seroconverted against wild-type-SARS-CoV-2 virus, showing comparable antibody responses to healthy participants. After 6 months, one patient in BNT162b2 and all four patients in CoronaVac groups maintained seropositivity. The JN-1 specific binding antibody response was lower compared to wild-type virus. The use of corticosteroids did not affect seroconversion rate against wild-type virus or JN.1 variant. BNT162b2 and CoronaVac were immunogenic for neuromuscular diseases patients, maintaining durability after 6 months even for those on corticosteroids. Our data support a rapid immunization series utilizing mRNA-based and whole-virus inactivated vaccines for future pandemic.
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Affiliation(s)
- Michael Kwan Leung Yu
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Sophelia Hoi Shan Chan
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Daniel Leung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Samuel Cheng
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Leo Chi Hang Tsang
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Tsz Chun Kwan
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Kaiyue Zhang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Xiwei Wang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Wenwei Tu
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Malik Peiris
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Yu Lung Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Jaime S. Rosa Duque
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
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Santi T, Jo J, Harahap AR, Werdhani RA, Hadinegoro SRS, SahBandar IN, Prayitno A, Munasir Z, Vandenplas Y, Hegar B. The Improvement of Adaptive Immune Responses towards COVID-19 Following Diphtheria-Tetanus-Pertussis and SARS-CoV-2 Vaccinations in Indonesian Children: Exploring the Roles of Heterologous Immunity. Vaccines (Basel) 2024; 12:1032. [PMID: 39340062 PMCID: PMC11435621 DOI: 10.3390/vaccines12091032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 08/20/2024] [Accepted: 08/25/2024] [Indexed: 09/30/2024] Open
Abstract
BACKGROUND Routine childhood vaccination, e.g., for diphtheria, tetanus, and pertussis (DTP), might provide additional protection against SARS-CoV-2 infection. This concept of heterologous immunity was explored in healthy children receiving both DTP and inactivated SARS-CoV-2 vaccines. METHODS A cross-sectional study was performed on 154 healthy children aged 6-8 years old in Jakarta, Indonesia. Their vaccination status for the DTP (including a diphtheria-tetanus booster vaccine at 5 years old) and CoronaVac (from 6 years old) vaccines were recorded. Peripheral blood samples were collected from all participants, in which anti-diphtheria toxoid IgG and anti-SARS-CoV-2 S-RBD antibodies and T cell-derived IFN-γ were measured. RESULTS The study participants with complete DTP vaccination had significantly higher titers of anti-diphtheria toxoid IgG than the ones without (median = 0.9349 versus 0.2113 IU/mL; p < 0.0001). Upon stratification based on DTP and CoronaVac vaccination statuses, the participants with complete DTP and CoronaVac vaccinations had the highest titer of anti-SARS-CoV-2 S-RBD antibodies (median = 1196 U/mL) and the highest concentration of SARS-CoV-2-specific T cell-derived IFN-γ (median = 560.9 mIU/mL) among all the groups. CONCLUSIONS Healthy children aged 6-8 years old with complete DTP and CoronaVac vaccinations exhibited stronger SARS-CoV-2-specific T cell immune responses. This might suggest an additional benefit of routine childhood vaccination in generating protection against novel pathogens, presumably via heterologous immunity.
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Affiliation(s)
- Theresia Santi
- Doctoral Program in Medical Science, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Juandy Jo
- Department of Biology, Faculty of Health Sciences, Universitas Pelita Harapan, Tangerang 15811, Indonesia
- Mochtar Riady Institute for Nanotechnology, Tangerang 15811, Indonesia
| | - Alida Roswita Harahap
- Doctoral Program in Medical Science, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Retno Asti Werdhani
- Department of Community Medicine, Cipto Mangunkkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Sri Rezeki S Hadinegoro
- Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Ivo Novita SahBandar
- Department of Microbiology, School of Medicine, Iwate Medical University, Morioka 028-3694, Japan
| | - Ari Prayitno
- Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Zakiudin Munasir
- Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
| | - Yvan Vandenplas
- Department of Pediatric, Universitair Ziekenhuis Brussel, 1090 Jette, Belgium
| | - Badriul Hegar
- Department of Child Health, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
- Indonesian Medical Education and Research Institute, Faculty of Medicine, Universitas Indonesia, Jakarta 10430, Indonesia
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Díaz-Dinamarca DA, Cárdenas-Cáceres S, Muena NA, Díaz P, Barra G, Puentes R, Escobar DF, Díaz-Samirin M, Santis-Alay NT, Canales C, Díaz J, García-Escorza HE, Grifoni A, Sette A, Tischler ND, Vasquez AE. Booster Vaccination with BNT162b2 Improves Cellular and Humoral Immune Response in the Pediatric Population Immunized with CoronaVac. Vaccines (Basel) 2024; 12:919. [PMID: 39204043 PMCID: PMC11359105 DOI: 10.3390/vaccines12080919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 05/01/2024] [Accepted: 05/03/2024] [Indexed: 09/03/2024] Open
Abstract
The SARS-CoV-2 Omicron variant and its sublineages continue to cause COVID-19-associated pediatric hospitalizations, severe disease, and death globally. BNT162b2 and CoronaVac are the main vaccines used in Chile. Much less is known about the Wuhan-Hu-1 strain-based vaccines in the pediatric population compared to adults. Given the worldwide need for booster vaccinations to stimulate the immune response against new Omicron variants of SARS-CoV-2, we characterized the humoral and cellular immune response against Omicron variant BA.1 in a pediatric cohort aged 10 to 16 years who received heterologous vaccination based on two doses of CoronaVac, two doses of CoronaVac (2x) plus one booster dose of BNT162b2 [CoronaVac(2x) + BNT162b2 (1x)], two doses of CoronaVac plus two booster doses of BNT162b2 [CoronaVac(2x) + BNT162b2 (2x)], and three doses of BNT162b2. We observed that the [CoronaVac(2x) + BNT162b2 (2x)] vaccination showed higher anti-S1 and neutralizing antibody titers and CD4 and CD8 T cell immunity specific to the Omicron variant compared to immunization with two doses of CoronaVac alone. Furthermore, from all groups tested, immunity against Omicron was highest in individuals who received three doses of BNT162b2. We conclude that booster vaccination with BNT162b2, compared to two doses of CoronaVac alone, induces a greater protective immunity.
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Affiliation(s)
- Diego A. Díaz-Dinamarca
- Subdepartamento Innovación y Desarrollo, Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (D.A.D.-D.); (P.D.); (G.B.); (D.F.E.)
| | - Simone Cárdenas-Cáceres
- Laboratorio de Virología Molecular, Centro Ciencia & Vida, Fundación Ciencia & Vida, Santiago 8581151, Chile; (S.C.-C.); (N.A.M.)
| | - Nicolás A. Muena
- Laboratorio de Virología Molecular, Centro Ciencia & Vida, Fundación Ciencia & Vida, Santiago 8581151, Chile; (S.C.-C.); (N.A.M.)
| | - Pablo Díaz
- Subdepartamento Innovación y Desarrollo, Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (D.A.D.-D.); (P.D.); (G.B.); (D.F.E.)
| | - Gisselle Barra
- Subdepartamento Innovación y Desarrollo, Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (D.A.D.-D.); (P.D.); (G.B.); (D.F.E.)
| | - Rodrigo Puentes
- Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (R.P.); (N.T.S.-A.); (C.C.); (J.D.)
| | - Daniel F. Escobar
- Subdepartamento Innovación y Desarrollo, Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (D.A.D.-D.); (P.D.); (G.B.); (D.F.E.)
| | - Michal Díaz-Samirin
- Subdepartamento Innovación y Desarrollo, Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (D.A.D.-D.); (P.D.); (G.B.); (D.F.E.)
| | - Natalia T. Santis-Alay
- Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (R.P.); (N.T.S.-A.); (C.C.); (J.D.)
| | - Cecilia Canales
- Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (R.P.); (N.T.S.-A.); (C.C.); (J.D.)
| | - Janepsy Díaz
- Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (R.P.); (N.T.S.-A.); (C.C.); (J.D.)
| | | | - Alba Grifoni
- Center for Vaccine Innovation, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA; (A.G.); (A.S.)
| | - Alessandro Sette
- Center for Vaccine Innovation, La Jolla Institute for Immunology (LJI), La Jolla, CA 92037, USA; (A.G.); (A.S.)
- Department of Pathology, University of California San Diego, La Jolla, CA 92093, USA
| | - Nicole D. Tischler
- Laboratorio de Virología Molecular, Centro Ciencia & Vida, Fundación Ciencia & Vida, Santiago 8581151, Chile; (S.C.-C.); (N.A.M.)
- Escuela de Bioquímica, Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago 7510157, Chile
| | - Abel E. Vasquez
- Subdepartamento Innovación y Desarrollo, Departamento Agencia Nacional de Dispositivos Médicos, Innovación y Desarrollo, Instituto de Salud Pública de Chile, Santiago 7780050, Chile; (D.A.D.-D.); (P.D.); (G.B.); (D.F.E.)
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Guo Z, Zeng T, Lu Y, Sun S, Liang X, Ran J, Wu Y, Chong MKC, Wang K, Zhao S. Transmission risks of Omicron BA.5 following inactivated COVID-19 vaccines among children and adolescents in China. COMMUNICATIONS MEDICINE 2024; 4:92. [PMID: 38762678 PMCID: PMC11102477 DOI: 10.1038/s43856-024-00521-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 05/03/2024] [Indexed: 05/20/2024] Open
Abstract
BACKGROUND As SARS-CoV-2 Omicron variants circulating globally since 2022, assessing the transmission characteristics, and the protection of vaccines against emerging Omicron variants among children and adolescents are needed for guiding the control and vaccination policies. METHODS We conducted a retrospective cohort study for SARS-CoV-2 infections and close contacts aged <18 years from an outbreak seeded by Omicron BA.5 variants. The secondary attack rate (SAR) was calculated and the protective effects of two doses of inactivated vaccine (mainly Sinopharm /BBIBP-CorV) within a year versus one dose or two doses above a year after vaccination against the transmission and infection of Omicron BA.5 were estimated. RESULTS A total of 3442 all-age close contacts of 122 confirmed SARS-CoV-2 infections aged 0-17 years were included. The SAR was higher in the household setting and for individuals who received a one-dose inactivated vaccine or those who received a two-dose for more than one year, with estimates of 28.5% (95% credible interval [CrI]: 21.1, 37.7) and 55.3% (95% CrI: 24.4, 84.8), respectively. The second dose of inactivated vaccine conferred substantial protection against all infection and transmission of Omicron BA.5 variants within a year. CONCLUSIONS Our findings support the rollout of the second dose of inactivated vaccine for children and adolescents during the Omciron BA.5 predominant epidemic phase. Given the continuous emergence of SARS-CoV-2 variants, monitoring the transmission risk and corresponding vaccine effectiveness against SARS-CoV-2 variants among children and adolescents is important to inform control strategy.
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Affiliation(s)
- Zihao Guo
- JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China
| | - Ting Zeng
- School of Public Health, Xinjiang Medical University, Urumqi, China
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asia, Department of Medical Engineering and Technology, Xinjiang Medical University, Urumqi, China
| | - Yaoqin Lu
- School of Public Health, Xinjiang Medical University, Urumqi, China
- Urumqi Center for Disease Control and Prevention, Urumqi, China
| | - Shengzhi Sun
- Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China
| | - Xiao Liang
- Department of Rehabilitation Sciences, Hong Kong Polytechnic University, Hong Kong, China
| | - Jinjun Ran
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yushan Wu
- JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China
- Centre for Health Systems and Policy Research, Chinese University of Hong Kong, Hong Kong, China
| | - Marc K C Chong
- JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China
- Centre for Health Systems and Policy Research, Chinese University of Hong Kong, Hong Kong, China
- Clinical Trials and Biostatistics Laboratory, CUHK Shenzhen Research Institute, Shenzhen, China
| | - Kai Wang
- School of Public Health, Xinjiang Medical University, Urumqi, China.
| | - Shi Zhao
- School of Public Health, Tianjin Medical University, Tianjin, China.
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin Medical University, Tianjin, China.
- MoE Key Laboratory of Prevention and Control of Major Diseases in the Population, Tianjin Medical University, Tianjin, China.
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Gregorio GEV, Catacutan AMB, Perez MLM, Dans LF. Efficacy, Effectiveness, and Safety of COVID-19 Vaccine Compared to Placebo in Preventing COVID-19 Infection among 12-17 Years Old: A Systematic Review. ACTA MEDICA PHILIPPINA 2024; 58:41-53. [PMID: 38882914 PMCID: PMC11168957 DOI: 10.47895/amp.v58i7.7930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Objectives The World Health Organization recently revised their recommendations and considered healthy children and adolescents as low priority group for COVID-19 vaccine. This review comprehensively assessed existing clinical evidence on COVID-19 vaccine in 12-17 years old. Methods Included in this review were any type of study that investigated the efficacy, immunogenicity, safety, and effectiveness of COVID-19 vaccine on protection against SARS-COV-2 infection in 12-17 years old. Various electronic databases were searched up to March 15, 2023. Studies were screened, data extracted, risk of bias appraised, and certainty of evidence was judged using GRADE. Review Manager 5.4 was used to estimate pooled effects. Difference between the two groups was described as mean difference for continuous variables and as relative risk or odds ratio for categorical variables. Results There were six randomized controlled trials and 16 effectiveness studies (8 cohorts and 8 case control). Low certainty evidence showed that BNT162b2 (Pfizer) was effective, immunogenic, and safe in healthy adolescents. There were 15 effectiveness studies on BNT162b2 (Pfizer) in healthy adolescent and one on immunocompromised patients. It was protective against infection with any of the variants, with higher protection against Delta than Omicron. BNT162b2 is protective against hospitalization and emergency and urgent care (high certainty); and critical care and MIS-C (low). Very low certainty evidence noted that BNT 162b2 was also immunogenic in 12-21 years old with rheumatic diseases while on immunomodulatory treatment but with possible increased exacerbation of illness. Low certainty evidence demonstrated that mRNA-1273 (Moderna) was effective, immunogenic, and safe. Low to very low certainty evidence were noted on the safety and immunogenicity of two vector base vaccines (ChAdOx1-19 and Ad5 vector COVID vaccine) and two inactivated vaccines (CoronaVac and BBIBP CorV). CONCLUSION There is presently low certainty evidence on the use of RNA vaccines in 12-17 years old. The recommendation on its use is weak. There is presently insufficient evidence for the use of inactivated and vector-based COVID-19 vaccines. Different countries should consider whether to vaccinate healthy adolescent without comprising the other recommended immunization and health priorities that are crucial for this age group. Other factors including cost-effectiveness of vaccination and disease burden should be accounted.
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Affiliation(s)
- Germana Emerita V Gregorio
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, College of Medicine and Philippine General Hospital, University of the Philippines Manila
| | | | - Ma Lucila M Perez
- Clinical Trials and Research Division, Philippine Children's Medical Center, Quezon City
- College of Medicine, St. Luke's Medical Center, Quezon City
| | - Leonila F Dans
- Division of Pediatric Rheumatology, Department of Pediatrics, College of Medicine and Philippine General Hospital, University of the Philippines Manila
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Lu W, Zeng S, Yao Y, Luo Y, Ruan T. The effect of COVID-19 vaccine to the Omicron variant in children and adolescents: a systematic review and meta-analysis. Front Public Health 2024; 12:1338208. [PMID: 38660347 PMCID: PMC11041831 DOI: 10.3389/fpubh.2024.1338208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 03/27/2024] [Indexed: 04/26/2024] Open
Abstract
Background Omicron (B.1.1.529), a variant of SARS-CoV-2, has emerged as a dominant strain in COVID-19 pandemic. This development has raised concerns about the effectiveness of vaccination to Omicron, particularly in the context of children and adolescents. Our study evaluated the efficacy of different COVID-19 vaccination regimens in children and adolescents during the Omicron epidemic phase. Methods We searched PubMed, Cochrane, Web of Science, and Embase electronic databases for studies published through March 2023 on the association between COVID-19 vaccination and vaccine effectiveness (VE) against SARS-CoV-2 infection in children and adolescents at the Omicron variant period. The effectiveness outcomes included mild COVID-19 and severe COVID-19. This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and was prospectively registered in PROSPERO (CRD42023390481). Results A total of 33 studies involving 16,532,536 children were included in the analysis. First, in children and adolescents aged 0-19 years, the overall VE of the COVID-19 vaccine is 45% (95% confidence interval [CI]: 40 to 50%). Subgroup analysis of VE during Omicron epidemic phase for different dosage regimens demonstrated that the VE was 50% (95% CI: 44 to 55%) for the 2-dose vaccination and 61% (95% CI: 45 to 73%) for the booster vaccination. Upon further analysis of different effectiveness outcomes during the 2-dose vaccination showed that the VE was 41% (95% CI: 35 to 47%) against mild COVID-19 and 71% (95% CI: 60 to 79%) against severe COVID-19. In addition, VE exhibited a gradual decrease over time, with the significant decline in the efficacy of Omicron for infection before and after 90 days following the 2-dose vaccination, registering 54% (95% CI: 48 to 59%) and 34% (95% CI: 21 to 56%), respectively. Conclusion During the Omicron variant epidemic, the vaccine provided protection against SARS-CoV-2 infection in children and adolescents aged 0-19 years. Two doses of vaccination can provide effective protection severe COVID-19, with booster vaccination additionally enhancing VE.
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Affiliation(s)
- Wenting Lu
- Institute of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Integrated Care Management Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shuai Zeng
- Department of Obstetrics and Gynecology, National Clinical Research Center for Obstetrics and Gynecology (Peking University Third Hospital), National Center for Healthcare Quality Management in Obstetrics, Peking University Third Hospital, Peking University, Beijing, China
| | - Yuan Yao
- General Practice Ward/International Medical Center Ward, General Practice Medical Center, West China Hospital, Sichuan University, Chengdu, China
| | - Yiting Luo
- Institute of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Integrated Care Management Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Tiechao Ruan
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China
- Key Laboratory of Obstetrics & Gynecologic and Pediatric Diseases and Birth Defects of the Ministry of Education, Sichuan University, Chengdu, China
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7
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Wong WHS, Leung DL, Yip KM, So HK, Rosa Duque JS, Lau YL. Effectiveness of inactivated COVID-19 vaccine CoronaVac in children aged less than 3 years old during Omicron wave in Hong Kong. Vaccine 2024; 42:2135-2137. [PMID: 38453618 DOI: 10.1016/j.vaccine.2024.02.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 02/05/2024] [Accepted: 02/22/2024] [Indexed: 03/09/2024]
Abstract
The COVID-19 pandemic has affected people of all ages worldwide. However, there is still no information on the vaccine effectiveness (VE) of inactivated COVID-19 vaccines in children aged less than 3 years old. This study highlighted that 2 doses of CoronaVac were effective in preventing COVID-19, with a VE of 83.1 %.
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Affiliation(s)
- W H S Wong
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - D L Leung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - K M Yip
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - H K So
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - J S Rosa Duque
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China.
| | - Y L Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China.
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Rosa Duque JS, Cheng SMS, Cohen CA, Leung D, Wang X, Mu X, Chung Y, Lau TM, Wang M, Zhang W, Zhang Y, Wong HHW, Tsang LCH, Chaothai S, Kwan TC, Li JKC, Chan KCK, Luk LLH, Ho JCH, Li WY, Lee AMT, Lam JHY, Chan SM, Wong WHS, Tam IYS, Mori M, Valkenburg SA, Peiris M, Tu W, Lau YL. Superior antibody and membrane protein-specific T-cell responses to CoronaVac by intradermal versus intramuscular routes in adolescents. World J Pediatr 2024; 20:353-370. [PMID: 38085470 PMCID: PMC11052846 DOI: 10.1007/s12519-023-00764-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/18/2023] [Indexed: 04/29/2024]
Abstract
BACKGROUND Optimising the immunogenicity of COVID-19 vaccines to improve their protection against disease is necessary. Fractional dosing by intradermal (ID) administration has been shown to be equally immunogenic as intramuscular (IM) administration for several vaccines, but the immunogenicity of ID inactivated whole severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) at the full dose is unknown. This study (NCT04800133) investigated the superiority of antibody and T-cell responses of full-dose CoronaVac by ID over IM administration in adolescents. METHODS Participants aged 11-17 years received two doses of IM or ID vaccine, followed by the 3rd dose 13-42 days later. Humoral and cellular immunogenicity outcomes were measured post-dose 2 (IM-CC versus ID-CC) and post-dose 3 (IM-CCC versus ID-CCC). Doses 2 and 3 were administered to 173 and 104 adolescents, respectively. RESULTS Spike protein (S) immunoglobulin G (IgG), S-receptor-binding domain (RBD) IgG, S IgG Fcγ receptor IIIa (FcγRIIIa)-binding, SNM [sum of individual (S), nucleocapsid protein (N), and membrane protein (M) peptide pool]-specific interleukin-2 (IL-2)+CD4+, SNM-specific IL-2+CD8+, S-specific IL-2+CD8+, N-specific IL-2+CD4+, N-specific IL-2+CD8+ and M-specific IL-2+CD4+ responses fulfilled the superior and non-inferior criteria for ID-CC compared to IM-CC, whereas IgG avidity was inferior. For ID-CCC, S-RBD IgG, surrogate virus neutralisation test, 90% plaque reduction neutralisation titre (PRNT90), PRNT50, S IgG avidity, S IgG FcγRIIIa-binding, M-specific IL-2+CD4+, interferon-γ+CD8+ and IL-2+CD8+ responses were superior and non-inferior to IM-CCC. The estimated vaccine efficacies were 49%, 52%, 66% and 79% for IM-CC, ID-CC, IM-CCC and ID-CCC, respectively. The ID groups reported more local, mild adverse reactions. CONCLUSION This is the first study to demonstrate superior antibody and M-specific T-cell responses by ID inactivated SARS-CoV-2 vaccination and serves as the basis for future research to improve the immunogenicity of inactivated vaccines.
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Affiliation(s)
- Jaime S Rosa Duque
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Samuel M S Cheng
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Carolyn A Cohen
- School of Public Health, The University of Hong Kong, Hong Kong, China
- HKU-Pasteur Research Pole, School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Daniel Leung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Xiwei Wang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Xiaofeng Mu
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Yuet Chung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Tsun Ming Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Manni Wang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Wenyue Zhang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Yanmei Zhang
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Howard H W Wong
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Leo C H Tsang
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Sara Chaothai
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Tsz Chun Kwan
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - John K C Li
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Karl C K Chan
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Leo L H Luk
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Jenson C H Ho
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Wing Yan Li
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Amos M T Lee
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Jennifer H Y Lam
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Sau Man Chan
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Wilfred H S Wong
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Issan Y S Tam
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Masashi Mori
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi, Japan
| | - Sophie A Valkenburg
- School of Public Health, The University of Hong Kong, Hong Kong, China.
- HKU-Pasteur Research Pole, School of Public Health, The University of Hong Kong, Hong Kong, China.
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection, and Immunity, University of Melbourne, Melbourne, VIC, Australia.
| | - Malik Peiris
- School of Public Health, The University of Hong Kong, Hong Kong, China.
- Center for Immunology and Infection C2i, Hong Kong, China.
| | - Wenwei Tu
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China.
| | - Yu Lung Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China.
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Wong CKH, Lau KTK, Au ICH, Lau EHY, Cowling BJ. Effectiveness of mRNA BNT162b2 and inactivated CoronaVac vaccines against severe COVID-19 outcomes among non-hospitalised children aged 1-3 years with SARS-CoV-2 Omicron infection. Int J Antimicrob Agents 2024; 63:107094. [PMID: 38272281 DOI: 10.1016/j.ijantimicag.2024.107094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/05/2023] [Accepted: 01/12/2024] [Indexed: 01/27/2024]
Abstract
OBJECTIVES Clinical evidence on the effectiveness of COVID-19 vaccines for children aged 1-3 years is scarce. The effectiveness of COVID-19 vaccines was evaluated among non-hospitalised children aged 1-3 years with SARS-CoV-2 Omicron infection in Hong Kong. METHODS A retrospective cohort of all non-hospitalised children aged 1-3 years with confirmed SARS-CoV-2 infection between 4 August 2022 and 29 January 2023 in Hong Kong was analysed. Vaccinated group was defined as the recipients of one or more doses of CoronaVac or mRNA vaccine BNT162b2 (original, monovalent) at least 14 days prior to infection. Hazard ratios (HR) with 95% confidence intervals (95% CI) of study outcomes were estimated using Cox regression models. Effectiveness outcomes included 28-day all-cause mortality and COVID-19-related hospitalisation. RESULTS A total of 5552 vaccinated patients and 5552 propensity-score matched controls (unvaccinated patients) were included for analysis. The cumulative incidence of COVID-19-related hospitalisation over 28 days was 2.3% and 2.9% in the vaccinated and control groups, respectively. There were no deaths in both groups. COVID-19 vaccination was associated with a significant reduction in 28-day COVID-19-related hospitalisation risk (HR=0.785, 95% CI=0.626-0.985, P=0.037), particularly for children aged 3 years, those who had received two or more vaccine doses, and those who received CoronaVac as the last dose. CONCLUSION COVID-19 vaccination is associated with a significantly lower risk of 28-day COVID-19-related hospitalisation among infected children aged 1-3 years, particularly those who had received two or more vaccine doses. This observation emphasises the importance of completing the full two-dose or three-dose series to optimise vaccine effectiveness.
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Affiliation(s)
- Carlos K H Wong
- Laboratory of Data Discovery for Health (D(2)4H), Hong Kong SAR, China; Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; Department of Family Medicine and Primary Care, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; Department of Infectious Disease Epidemiology & Dynamics, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.
| | - Kristy T K Lau
- Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ivan C H Au
- Department of Pharmacology and Pharmacy, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Eric H Y Lau
- Laboratory of Data Discovery for Health (D(2)4H), Hong Kong SAR, China; WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Benjamin J Cowling
- Laboratory of Data Discovery for Health (D(2)4H), Hong Kong SAR, China; WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
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10
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Hu W, Liu X, Lu X, Zhang D, Liu S, Gu X, Liu D, Sun J, Zhou T, Li X, Gao Y, Zhao Y, Cui G, Zhang S. Immunogenicity, safety and consistency of seven lots of an inactivated COVID-19 vaccine in healthy children and adolescents: a randomized, double-blind, controlled, phase IV clinical trial. Front Immunol 2024; 14:1320352. [PMID: 38250072 PMCID: PMC10796506 DOI: 10.3389/fimmu.2023.1320352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/12/2023] [Indexed: 01/23/2024] Open
Abstract
Background CoronaVac has been authorized worldwide for preventing coronavirus disease 2019. Information on the safety, immunogenicity and consistency of different lots and workshops of CoronaVac is presented here. Methods In this randomized, double-blind, phase IV clinical trial in healthy children and adolescents aged 3-17 years, we aimed to assess the lot-to-lot and workshop-to-workshop consistency, as well as immunogenicity and safety of seven lots of commercial-scale CoronaVac from three workshops. Eligible participants were enrolled into three age cohorts (3-5, 6-11 and 12-17 years). Within each cohort, participants were randomly assigned to seven groups to receive two doses of CoronaVac, with four weeks apart. Serum samples were collected before the first dose and 28 days after the second dose for neutralizing antibody testing. The primary objective was to evaluate the consistency of immune response among different lots within workshop 2 or 3, as well as among different workshops. The primary endpoint was geometric mean titer (GMT) of neutralizing antibody at 28 days after full-course vaccination. Results Between July 27th and November 19th, 2021, a total of 2,520 eligible participants were enrolled. Results showed that 95% confidence intervals (CIs) of GMT ratios for all comparative groups among different lots or workshops were within the equivalence criteria of [0.67, 1.5]. The GMT and seroconversion rate for all participants were 126.42 (95%CI: 121.82, 131.19) and 99.86% (95%CI: 99.59%, 99.97%) at 28 days after two-dose vaccination. The incidences of adverse reactions were similar among seven lots, and most adverse reactions were mild in Grade 1, with no serious adverse event. Conclusion CoronaVac is well-tolerated and can elicit a good immune response among children and adolescents. Lot-to-lot consistency results indicate stable manufacturing of commercial-scale CoronaVac.
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Affiliation(s)
- Weijun Hu
- Institute of Immunization Program, Shaanxi Provincial Center for Disease Control and Prevention, Xi’an, China
| | - Xiaoyu Liu
- Institute of Immunization Program, Shaanxi Provincial Center for Disease Control and Prevention, Xi’an, China
| | - Xi Lu
- Medical Affairs Department, Sinovac Biotech Co., Ltd., Beijing, China
| | - Dan Zhang
- Institute of Immunization Program, Shaanxi Provincial Center for Disease Control and Prevention, Xi’an, China
| | - Shuo Liu
- Clinical Research and Development Center, Sinovac Biotech Co., Ltd., Beijing, China
| | - Xianjin Gu
- Department of Immunization Program, Yanliang District Center for Disease Control and Prevention, Xi’an, China
| | - Dan Liu
- Department of Immunization Program, Yanliang District Center for Disease Control and Prevention, Xi’an, China
| | - Jianwen Sun
- Medical Affairs Department, Sinovac Life Sciences Co., Ltd., Beijing, China
| | - Tiantian Zhou
- Institute of Immunization Program, Shaanxi Provincial Center for Disease Control and Prevention, Xi’an, China
| | - Xinge Li
- Clinical Research and Development Center, Sinovac Biotech Co., Ltd., Beijing, China
| | - Yongjun Gao
- Medical Affairs Department, Sinovac Biotech Co., Ltd., Beijing, China
| | - Yanwei Zhao
- Medical Affairs Department, Sinovac Life Sciences Co., Ltd., Beijing, China
| | - Guoliang Cui
- Quality Assurance Department, Sinovac Life Sciences Co., Ltd., Beijing, China
| | - Shaobai Zhang
- Institute of Immunization Program, Shaanxi Provincial Center for Disease Control and Prevention, Xi’an, China
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11
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Ghanem H, Ghanem S, AlMutawa E. An Outline of the Immunogenic Potential of Progressing SARSCoV- 2 Vaccine Technologies among Children and Adolescents. Recent Pat Biotechnol 2024; 18:180-189. [PMID: 38528666 DOI: 10.2174/1872208317666230612141930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/14/2023] [Accepted: 04/19/2023] [Indexed: 03/27/2024]
Abstract
BACKGROUND SARS-CoV-2, a highly dynamic beta-coronavirus, can afflict all age groups. Notably, over 16100 mortalities have been recorded among children as yet. In this regard, many vaccine projects are operational to assess immuno-potency among young cohorts. A bulk of reports have evidenced the efficacy of these immunization technologies in the elderly population, though the impact is yet to be determined among children. OBJECTIVES This review is envisioned to outline the current efficacy of contributing vaccine technologies and examine the dose-dependent impact of immunization regimens in lowering the risks of SARS-CoV-2 infections among children and adolescents. Furthermore, the current review exclusively estimated the vaccine impact at current doses. METHODS A total of 52 research papers extracted from PubMed, Pubmed Central, Science Direct, Research Gate, Google Scholar and Semantic Scholar were screened along with an emphasis on patents. Inclusion criteria involved all published reports directly or indirectly linked to the contributing vaccine candidates that are operational among the young cohort. Unrelated research papers were excluded from the study. Key search terminologies included information on vaccine identifiers, such as name, type and clinical trial ID, and successively restricted to children and adolscents age groups. RESULTS Several vaccine designs, such as mRNA-based vaccinations, viral vector vaccines, DNA vaccines, inactivated vaccines, recombinant vaccines, and protein-based immunizations, are being examined at various stages of clinical trials to gauge the effects on children and adolescents. With reference to the published reports, the mRNA 1273 (1610 GMT; 6-10 yrs, 1401 GMT; 12-15 yrs), BNT162b2 (1407 GMT; 6 months- <2 yrs, 1535 GMT; 2-4 yrs, 4583 GMT; 5-11 yrs, 1239.5 GMT; 12-15 yrs) and Ad5 nCoV (1037.5 GMT; 6-17 yrs) offered relatively high neutralization titers with sharp seroconversion rates compared to MVC-COV1901 (648.5 GMT; 12-17 yrs) and ZyCoV-D (133.49 GMT; 12-17 yrs), which produced modest immune responses. CONCLUSION Currently, the WHO is analyzing emerging evidence to issue an emergency use list of vaccines for vaccinating children and adolescents.
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Affiliation(s)
- Hytham Ghanem
- Department of Paediatric Emergency Medicine, Royal Medical Services Hospital, Rifaa, Bahrain
| | - Shehab Ghanem
- Department of Surgery, Royal Medical Services Hospital, Rifaa, Bahrain
| | - Ehsan AlMutawa
- Department of Surgery, Royal Medical Services Hospital, Rifaa, Bahrain
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12
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Wee LE, Tang N, Pang D, Chiew C, Yung CF, Chong CY, Lee V, Ong B, Lye DC, Tan KB. Effectiveness of Monovalent mRNA Vaccines Against Omicron XBB Infection in Singaporean Children Younger Than 5 Years. JAMA Pediatr 2023; 177:1324-1331. [PMID: 37843856 PMCID: PMC10580153 DOI: 10.1001/jamapediatrics.2023.4505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/22/2023] [Indexed: 10/17/2023]
Abstract
Importance Literature on vaccine effectiveness of SARS-CoV-2 messenger RNA (mRNA) vaccines for children younger than 5 years is limited. Objective To report the effectiveness of monovalent mRNA vaccines against SARS-CoV-2 infection among Singaporean children aged 1 through 4 years during a COVID-19 pandemic wave of the Omicron XBB variant. Design, Setting, and Participants This was a population-based cohort study, conducted over a 6-month study period from October 1, 2022, through March 31, 2023, after the implementation of community vaccination among all Singaporean children aged 1 through 4 years. The study period was dominated by the Omicron XBB subvariant. Exposure Receipt of SARS-CoV-2 mRNA vaccines. Main Outcome Measure Vaccine effectiveness against confirmed SARS-CoV-2 infection. The adjusted incidence rate ratio for confirmed infections using Poisson regression was reported, with the reference group being those who were unvaccinated. Analyses were stratified by prior documented SARS-CoV-2 infection. Results A total of 121 628 children (median [IQR] age, 3.1 [2.2-3.9] years; 61 925 male [50.9%]) were included in the study, contributing 21 015 956 person-days of observation. The majority of children (11 294 of 11 705 [96.5%]) received the mRNA-1273 COVID-19 vaccine (Moderna). Vaccine effectiveness against confirmed infection was 45.2% (95% CI, 24.7%-60.2%) in partially vaccinated, infection-naive children and 63.3% (95% CI, 40.6%-77.3%) in fully vaccinated, infection-naive children compared with the unvaccinated group. Among previously infected children, vaccine effectiveness against reinfections in those with at least 1 vaccine dose was estimated at 74.6% (95% CI, 38.7%-89.5%). Conclusions and Relevance Study results suggest that completion of a primary mRNA vaccine series provided protection against SARS-CoV-2 infection in children aged 1 through 4 years. Although incidence of hospitalization and severe illness is low in this age group, there is potential benefit of vaccination in preventing infection and potential sequelae.
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Affiliation(s)
- Liang En Wee
- National Centre for Infectious Diseases, Singapore
- Duke-NUS Graduate Medical School, National University of Singapore, Singapore
- Department of Infectious Diseases, Singapore General Hospital, Singapore
| | | | | | - Calvin Chiew
- National Centre for Infectious Diseases, Singapore
- Ministry of Health, Singapore
| | - Chee-Fu Yung
- Duke-NUS Graduate Medical School, National University of Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
- Infectious Disease Service, Department of Paediatrics, KK Women’s and Children’s Hospital, Singapore
| | - Chia Yin Chong
- Duke-NUS Graduate Medical School, National University of Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
- Infectious Disease Service, Department of Paediatrics, KK Women’s and Children’s Hospital, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Vernon Lee
- National Centre for Infectious Diseases, Singapore
- Ministry of Health, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Benjamin Ong
- Ministry of Health, Singapore
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore
| | - David Chien Lye
- National Centre for Infectious Diseases, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore
| | - Kelvin Bryan Tan
- Ministry of Health, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
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13
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Wen J, Du X, Li A, Zhang S, Shen S, Zhang Z, Yang L, Sun C, Li J, Zhu S. Dilemmas and options for COVID-19 vaccination in children. Ital J Pediatr 2023; 49:103. [PMID: 37620892 PMCID: PMC10464401 DOI: 10.1186/s13052-023-01513-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/19/2023] [Indexed: 08/26/2023] Open
Abstract
Over 16 million children have been detected positive for the coronavirus disease 2019 (COVID-19) in the United States since the outbreak of the pandemic. In general, children infected with severe acute respiratory syndrome coronavirus type 2 tend to have lighter symptoms than adults. However, in some cases, the infection can develop into severe forms, such as multisystem inflammatory syndrome in children. Moreover, long-term public health preventive interventions have had some negative effects on the physical and mental health of children. Given the important role that vaccination plays in reducing severe illness and mortality, it is essential for the efficient implementation of vaccination in the pediatric population. Nevertheless, parental distrust of vaccination, especially with regard to its safety and efficacy, hinders this process. Herein, we comprehensively summarize the available data on the safety and effectiveness of COVID-19 vaccine in children. The results show that the currently approved COVID-19 vaccine is safe and effective for children. Although two doses of vaccine in children seem insufficient to prevent Omicron infection, the booster dose provides enhanced protection against infection and severe illness. Most importantly, the bivalent vaccine has been approved for use in the pediatric population to extend the immune response to currently circulating Omicron variant. And the immune protection afforded to newborns after maternal vaccination appears to last only 6 months. Therefore, in the current situation where the rate of virus mutation is accelerating and the COVID-19 pandemic is still severe, it is crucial to extend vaccine protection to children over 6 months of age to weave a tighter safety net.
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Affiliation(s)
- Jingzhi Wen
- Department of Paediatrics, Yantai Yeda Hospital, Yantai, Shandong, 264006, China
| | - Xiaoan Du
- Jining Medical University, Jining, Shandong, 272067, China
| | - Adan Li
- Jining Medical University, Jining, Shandong, 272067, China
| | - Shungeng Zhang
- Jining Medical University, Jining, Shandong, 272067, China
| | - Shengyun Shen
- Jining Medical University, Jining, Shandong, 272067, China
| | - Ziteng Zhang
- Jining Medical University, Jining, Shandong, 272067, China
| | - Liyuan Yang
- Jining Medical University, Jining, Shandong, 272067, China
| | - Changqing Sun
- Department of Paediatrics, Yantai Yeda Hospital, Yantai, Shandong, 264006, China
| | - Jianing Li
- Department of Paediatrics, Yantai Yeda Hospital, Yantai, Shandong, 264006, China.
| | - Shiheng Zhu
- Cheeloo College of Medicine, Shandong University, Jinan, 250012, China.
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Piechotta V, Siemens W, Thielemann I, Toews M, Koch J, Vygen-Bonnet S, Kothari K, Grummich K, Braun C, Kapp P, Labonté V, Wichmann O, Meerpohl JJ, Harder T. Safety and effectiveness of vaccines against COVID-19 in children aged 5-11 years: a systematic review and meta-analysis. THE LANCET. CHILD & ADOLESCENT HEALTH 2023; 7:379-391. [PMID: 37084750 PMCID: PMC10112865 DOI: 10.1016/s2352-4642(23)00078-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/28/2023] [Accepted: 03/07/2023] [Indexed: 04/23/2023]
Abstract
BACKGROUND To date, more than 761 million confirmed SARS-CoV-2 infections have been recorded globally, and more than half of all children are estimated to be seropositive. Despite high SARS-CoV-2 infection incidences, the rate of severe COVID-19 in children is low. We aimed to assess the safety and efficacy or effectiveness of COVID-19 vaccines approved in the EU for children aged 5-11 years. METHODS In this systematic review and meta-analysis, we included studies of any design identified through searching the COVID-19 L·OVE (living overview of evidence) platform up to Jan 23, 2023. We included studies with participants aged 5-11 years, with any COVID-19 vaccine approved by the European Medicines Agency-ie, mRNA vaccines BNT162b2 (Pfizer-BioNTech), BNT162b2 Bivalent (against original strain and omicron [BA.4 or BA.5]), mRNA-1273 (Moderna), or mRNA-1273.214 (against original strain and omicron BA.1). Efficacy and effectiveness outcomes were SARS-CoV-2 infection (PCR-confirmed or antigen-test confirmed), symptomatic COVID-19, hospital admission due to COVID-19, COVID-19-related mortality, multisystem inflammatory syndrome in children (MIS-C), and long-term effects of COVID-19 (long COVID or post-COVID-19 condition as defined by study investigators or per WHO definition). Safety outcomes of interest were serious adverse events, adverse events of special interest (eg, myocarditis), solicited local and systemic events, and unsolicited adverse events. We assessed risk of bias and rated the certainty of evidence (CoE) using the Grading of Recommendations Assessment, Development and Evaluation approach. This study was prospectively registered with PROSPERO, CRD42022306822. FINDINGS Of 5272 screened records, we included 51 (1·0%) studies (n=17 [33%] in quantitative synthesis). Vaccine effectiveness after two doses against omicron infections was 41·6% (95% CI 28·1-52·6; eight non-randomised studies of interventions [NRSIs]; CoE low), 36·2% (21·5-48·2; six NRSIs; CoE low) against symptomatic COVID-19, 75·3% (68·0-81·0; six NRSIs; CoE moderate) against COVID-19-related hospitalisations, and 78% (48-90, one NRSI; CoE very low) against MIS-C. Vaccine effectiveness against COVID-19-related mortality was not estimable. Crude event rates for deaths in unvaccinated children were less than one case per 100 000 children, and no events were reported for vaccinated children (four NRSIs; CoE low). No study on vaccine effectiveness against long-term effects was identified. Vaccine effectiveness after three doses was 55% (50-60; one NRSI; CoE moderate) against omicron infections, and 61% (55-67; one NRSI; CoE moderate) against symptomatic COVID-19. No study reported vaccine efficacy or effectiveness against hospitalisation following a third dose. Safety data suggested no increased risk of serious adverse events (risk ratio [RR] 0·83 [95% CI 0·21-3·33]; two randomised controlled trials; CoE low), with approximately 0·23-1·2 events per 100 000 administered vaccines reported in real-life observations. Evidence on the risk of myocarditis was uncertain (RR 4·6 [0·1-156·1]; one NRSI; CoE low), with 0·13-1·04 observed events per 100 000 administered vaccines. The risk of solicited local reactions was 2·07 (1·80-2·39; two RCTs; CoE moderate) after one dose and 2·06 (1·70-2·49; two RCTs; CoE moderate) after two doses. The risk of solicited systemic reactions was 1·09 (1·04-1·16; two RCTs; CoE moderate) after one dose and 1·49 (1·34-1·65; two RCTs; CoE moderate) after two doses. The risk of unsolicited adverse events after two doses (RR 1·21 [1·07-1·38]; CoE moderate) was higher among mRNA-vaccinated compared with unvaccinated children. INTERPRETATION In children aged 5-11 years, mRNA vaccines are moderately effective against infections with the omicron variant, but probably protect well against COVID-19 hospitalisations. Vaccines were reactogenic but probably safe. Findings of this systematic review can serve as a basis for public health policy and individual decision making on COVID-19 vaccination in children aged 5-11 years. FUNDING German Federal Joint Committee.
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Affiliation(s)
| | - Waldemar Siemens
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany
| | | | - Markus Toews
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Judith Koch
- Immunisation Unit, Robert Koch Institute, Berlin, Germany
| | | | | | - Kathrin Grummich
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany
| | - Cordula Braun
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany
| | - Philipp Kapp
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Valérie Labonté
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany
| | - Ole Wichmann
- Immunisation Unit, Robert Koch Institute, Berlin, Germany
| | - Joerg J Meerpohl
- Institute for Evidence in Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany
| | - Thomas Harder
- Immunisation Unit, Robert Koch Institute, Berlin, Germany
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15
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Yu MKL, Chan SHS, Cheng S, Leung D, Chan SM, Yan ASK, Wong WHS, Peiris M, Lau YL, Rosa Duque JS. Hesitancy, reactogenicity and immunogenicity of the mRNA and whole-virus inactivated Covid-19 vaccines in pediatric neuromuscular diseases. Hum Vaccin Immunother 2023:2206278. [PMID: 37157992 DOI: 10.1080/21645515.2023.2206278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
The mRNA-based BNT162b2 and inactivated whole-virus CoronaVac are two widely used COVID-19 vaccines that confer immune protection to healthy individuals. However, hesitancy toward COVID-19 vaccination appeared to be common for patients with neuromuscular diseases (NMDs) due to the paucity of data on the safety and efficacy in this high-risk patient population. Therefore, we examined the underlying factors associated with vaccine hesitancy across time for NMDs and assessed the reactogenicity and immunogenicity of these two vaccines. Patients aged 8-18 years with no cognitive delay were invited to complete surveys in January and April 2022. Patients aged 2-21 years were enrolled for COVID-19 vaccination between June 2021 and April 2022, and they recorded adverse reactions (ARs) for 7 days after vaccination. Peripheral blood was obtained before and within 49 days after vaccination to measure serological antibody responses compared to healthy children and adolescents. Forty-one patients completed vaccine hesitancy surveys for both timepoints, while 22 joined the reactogenicity and immunogenicity arm of the study. Two or more family members vaccinated against COVID-19 was positively associated with intention of vaccination (odds ratio 11.7, 95% CI 1.81-75.1, p = .010). Pain at the injection site, fatigue, and myalgia were the commonest ARs. Most ARs were mild (75.5%, n = 71/94). All 19 patients seroconverted against the wildtype SARS-CoV-2 after two doses of either vaccine, similar to 280 healthy counterparts. There was lower neutralization against the Omicron BA.1 variant. BNT162b2 and CoronaVac were safe and immunogenic for patients with NMDs, even in those on low-dose corticosteroids.
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Affiliation(s)
- Michael Kwan Leung Yu
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Sophelia Hoi Shan Chan
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Samuel Cheng
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Daniel Leung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Sau Man Chan
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Amy Suen Ka Yan
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Wilfred Hing Sang Wong
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Malik Peiris
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Yu Lung Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Jaime S Rosa Duque
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
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Rosa Duque JS, Leung D, Yip KM, Lee DHL, So HK, Wong WHS, Lau YL. COVID-19 vaccines versus pediatric hospitalization. Cell Rep Med 2023; 4:100936. [PMID: 36801010 PMCID: PMC9868379 DOI: 10.1016/j.xcrm.2023.100936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 11/03/2022] [Accepted: 01/13/2023] [Indexed: 01/24/2023]
Abstract
Vaccine effectiveness of BNT162b2 and CoronaVac against COVID-19-associated hospitalization and moderate-to-severe disease due to SARS-CoV-2 Omicron BA.2 is studied from the 1.36 million doses administered to 766,601 of 953,400 children aged 3-11 years and adolescents aged 12-18 years in Hong Kong as of April 2022. These vaccines confer substantial protection.
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Affiliation(s)
- Jaime S Rosa Duque
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Daniel Leung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Ka Man Yip
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Derek H L Lee
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Hung-Kwan So
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China
| | - Wilfred H S Wong
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China.
| | - Yu Lung Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, China.
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Wu D, Nam R, Leung KSK, Waraich H, Purnomo A, Chou OHI, Perone F, Pawar S, Faraz F, Liu H, Zhou J, Liu T, Chan JSK, Tse G. Population-Based Clinical Studies Using Routinely Collected Data in Hong Kong, China: A Systematic Review of Trends and Established Local Practices. CARDIOVASCULAR INNOVATIONS AND APPLICATIONS 2023; 8. [DOI: 10.15212/cvia.2023.0073] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2024] Open
Abstract
Background: Routinely collected health data are increasingly used in clinical research. No study has systematically reviewed the temporal trends in the number of publications and analyzed different aspects of local research practices and their variations in Hong Kong, China, with a specific focus on research ethics governance and approval.
Methods: PubMed was systematically searched from its inception to March 28, 2023, for studies using routinely collected healthcare data from Hong Kong.
Results: A total of 454 studies were included. Between 2000 and 2009, 32 studies were identified. The number of publications increased from 5 to 120 between 2010 and 2022. Of the investigator-led studies using the Hospital Authority (HA)’s cross-cluster data (n = 393), 327 (83.2%) reported receiving ethics approval from a single cluster/university-based REC, whereas 50 studies (12.7%) did not report approval from a REC. For use of the HA Data Collaboration Lab, approval by a single hospital-based or University-based REC is accepted. Repeated submission of identical ethics applications to different RECs is estimated to cost HK$4.2 million yearly.
Conclusions: Most studies reported gaining approval from a single cluster REC before retrieval of cross-cluster HA data. Substantial cost savings would result if repeated review of identical ethics applications were not required.
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