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Li J, Li J, Dai S, Dang L, Wang L, Cao L, Chen X, Wang Y, Ge M, Liu W, Song Q, Xu W, Ma L. Pediatric population (aged 3-11 years) received primary inactivated SARS-CoV-2 vaccination prior to infection exhibiting robust humoral immune response following infected with Omicron variant: a study conducted in Beijing. Front Immunol 2023; 14:1269665. [PMID: 37828994 PMCID: PMC10565032 DOI: 10.3389/fimmu.2023.1269665] [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: 07/30/2023] [Accepted: 09/07/2023] [Indexed: 10/14/2023] Open
Abstract
Objective Analysis of SARS-CoV-2 IgG antibody and neutralizing antibody levels following SARS-CoV-2 infection in children aged 3-11 years, comparing those who had received the inactivated SARS-CoV-2 vaccine to those who were unvaccinated prior to infection, provides evidence for public health centers in formulating vaccination strategies and control policies. Methods A study was conducted on children who visited the Children's Hospital, Capital Institute of Pediatrics from January 10, 2023 to March 31, 2023 (Beijing, China). Participants or their guardians completed a survey questionnaire providing information about their SARS-CoV-2 infection history and vaccination status. Serum samples were collected for testing of SARS-CoV-2 immunoglobulin G (IgG) and neutralizing antibodies (Nabs), which were performed using chemiluminescence immunoassay. Results The study included 1,504 children aged 3-11 years with previous SARS-CoV-2 infection history. Among the 333 unvaccinated children, the serum SARS-CoV-2 IgG antibody level was median 2.30 (IQR, 1.27-3.99). However, children received one dose (78 cases) and two doses (1093 cases) of the inactivated vaccine prior to infection showed significantly higher SARS-CoV-2 IgG antibody levels, with values of median 10.11 (IQR, 8.66-10.93) and median 10.58 (IQR, 9.79-11.07), respectively. As to the unvaccinated children, 70.3% (234/333) were negative for SARS-CoV-2 Nabs, which were less than 6.00AU/ml. The remaining 29.7% (99/333) showed relatively low levels of Nabs, ranging from 6.00 to 50.00AU/ml. In contrast, for children who had received two doses of vaccine prior to infection, an overwhelming 99.3% (1086/1093) exhibited high levels of Nas in the range of 100.00-120.00 AU/ml. Remarkably, these elevated Nab levels persisted for at least a period of 3 months post-infection in children who had received two doses of inactivated SARS-CoV-2 vaccine prior to infection, regardless of age or sex and vaccine manufacturer. Conclusion The administration of two doses of inactivated SARS-CoV-2 vaccine prior to infection has been shown to significantly enhance humoral immunity following SARS-CoV-2 infection in pediatric populations, producing adequate Nabs that persist at elevated levels for up to 3 months post-infection. For unvaccinated children who displayed weak humoral immunity following a primary natural infection, timely vaccination is recommended to bolster their immunization protection. The findings underscore the importance of vaccination in strengthening immune responses and protecting pediatric populations against SARS-CoV-2 infection.
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Affiliation(s)
- Jing Li
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Jingjing Li
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Shuzhi Dai
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Li Dang
- Department of Outpatient Treatment Center, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Lin Wang
- Department of Child Health Care, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Ling Cao
- Department of Respiratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Xiaobo Chen
- Department of Endocrinology, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Ying Wang
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Menglei Ge
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Weijie Liu
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Qinwei Song
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Wenjian Xu
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
| | - Lijuan Ma
- Department of Clinical Laboratory, Children’s Hospital, Capital Institute of Pediatrics, Beijing, China
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2
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Nunez FA, Castro ACH, de Oliveira VL, Lima AC, Oliveira JR, de Medeiros GX, Sasahara GL, Santos KS, Lanfredi AJC, Alves WA. Electrochemical Immunosensors Based on Zinc Oxide Nanorods for Detection of Antibodies Against SARS-CoV-2 Spike Protein in Convalescent and Vaccinated Individuals. ACS Biomater Sci Eng 2023; 9:458-473. [PMID: 36048716 PMCID: PMC9469957 DOI: 10.1021/acsbiomaterials.2c00509] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 08/24/2022] [Indexed: 01/11/2023]
Abstract
Even after over 2 years of the COVID-19 pandemic, research on rapid, inexpensive, and accurate tests remains essential for controlling and avoiding the global spread of SARS-CoV-2 across the planet during a potential reappearance in future global waves or regional outbreaks. Assessment of serological responses for COVID-19 can be beneficial for population-level surveillance purposes, supporting the development of novel vaccines and evaluating the efficacy of different immunization programs. This can be especially relevant for broadly used inactivated whole virus vaccines, such as CoronaVac, which produced lower titers of neutralizing antibodies. and showed lower efficacy for specific groups such as the elderly and immunocompromised. We developed an impedimetric biosensor based on the immobilization of SARS-CoV-2 recombinant trimeric spike protein (S protein) on zinc oxide nanorod (ZnONR)-modified fluorine-doped tin oxide substrates for COVID-19 serology testing. Due to electrostatic interactions, the negatively charged S protein was immobilized via physical adsorption. The electrochemical response of the immunosensor was measured at each modification step and characterized by scanning electron microscopy and electrochemical techniques. We successfully evaluated the applicability of the modified ZnONR electrodes using serum samples from COVID-19 convalescent individuals, CoronaVac-vaccinated with or without positive results for SARS-CoV-2 infection, and pre-pandemic samples from healthy volunteers as controls. ELISA for IgG anti-SARS-CoV-2 spike protein was performed for comparison, and ELISA for IgG anti-RBDs of seasonal coronavirus (HCoVs) was used to test the specificity of immunosensor detection. No cross-reactivity with HCoVs was detected using the ZnONR immunosensor, and more interestingly, the sensor presented higher sensitivity when compared to negative ELISA results. The results demonstrate that the ZnONRs/spike-modified electrode displayed sensitive results for convalescents and vaccinated samples and shows excellent potential as a tool for the population's assessment and monitoring of seroconversion and seroprevalence.
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Affiliation(s)
- Freddy A. Nunez
- Centro de Ciências Naturais e Humanas,
Universidade Federal do ABC, Av. dos Estados, 5001, Santo
André, São Paulo09210-580, Brazil
| | - Ana C. H. Castro
- Centro de Ciências Naturais e Humanas,
Universidade Federal do ABC, Av. dos Estados, 5001, Santo
André, São Paulo09210-580, Brazil
| | - Vivian L. de Oliveira
- Centro de Ciências Naturais e Humanas,
Universidade Federal do ABC, Av. dos Estados, 5001, Santo
André, São Paulo09210-580, Brazil
- Laboratório de Imunologia, LIM19, Instituto do
Coração (InCor), Hospital das Clínicas da Faculdade de
Medicina da Universidade de São Paulo (HCFMUSP), Av. Dr. Arnaldo,
44, São Paulo, São Paulo05403-900, Brazil
| | - Ariane C. Lima
- Departamento de Clínica Médica, Disciplina
de Alergia e Imunologia Clínica, Faculdade de Medicina da Universidade
de São Paulo, Av. Dr. Arnaldo, 455, São Paulo, São
Paulo01246-903, Brazil
| | - Jamille R. Oliveira
- Departamento de Clínica Médica, Disciplina
de Alergia e Imunologia Clínica, Faculdade de Medicina da Universidade
de São Paulo, Av. Dr. Arnaldo, 455, São Paulo, São
Paulo01246-903, Brazil
| | - Giuliana X. de Medeiros
- Departamento de Clínica Médica, Disciplina
de Alergia e Imunologia Clínica, Faculdade de Medicina da Universidade
de São Paulo, Av. Dr. Arnaldo, 455, São Paulo, São
Paulo01246-903, Brazil
| | - Greyce L. Sasahara
- Laboratório de Imunologia, LIM19, Instituto do
Coração (InCor), Hospital das Clínicas da Faculdade de
Medicina da Universidade de São Paulo (HCFMUSP), Av. Dr. Arnaldo,
44, São Paulo, São Paulo05403-900, Brazil
| | - Keity S. Santos
- Laboratório de Imunologia, LIM19, Instituto do
Coração (InCor), Hospital das Clínicas da Faculdade de
Medicina da Universidade de São Paulo (HCFMUSP), Av. Dr. Arnaldo,
44, São Paulo, São Paulo05403-900, Brazil
- Departamento de Clínica Médica, Disciplina
de Alergia e Imunologia Clínica, Faculdade de Medicina da Universidade
de São Paulo, Av. Dr. Arnaldo, 455, São Paulo, São
Paulo01246-903, Brazil
| | - Alexandre J. C. Lanfredi
- Centro de Engenharia, Modelagem e Ciências
Sociais Aplicadas, Universidade Federal do ABC, Av. dos
Estados, 5001, Santo André, São Paulo09210-580,
Brazil
| | - Wendel A. Alves
- Centro de Ciências Naturais e Humanas,
Universidade Federal do ABC, Av. dos Estados, 5001, Santo
André, São Paulo09210-580, Brazil
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Jin L, Li Z, Zhang X, Li J, Zhu F. CoronaVac: A review of efficacy, safety, and immunogenicity of the inactivated vaccine against SARS-CoV-2. Hum Vaccin Immunother 2022; 18:2096970. [PMID: 35878789 DOI: 10.1080/21645515.2022.2096970] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
CoronaVac, also known as the Sinovac inactivated SARS-CoV-2 vaccine, has been widely implemented in combating the COVID-19 pandemic. We summarized the results of clinical trials and real-world studies of CoronaVac in this review. The overall efficacy for the prevention of symptomatic COVID-19 (before the emergence of variants of concern) using two doses of 3 μg CoronaVac was 67.7% (95% CI, 35.9% to 83.7%). Effectiveness in preventing hospitalizations, ICU admissions, and deaths was more prominent than that in preventing COVID-19. A third dose inherited the effectiveness against non-variants of concern and increased effectiveness against severe COVID-19 outcomes caused by omicron variants compared to two doses. Most adverse reactions were mild. Few vaccine-related serious adverse reactions have been reported. Moreover, three-dose regimen significantly increased the seroconversion levels of neutralizing antibodies against omicron as compared to two-dose regimen. This review of CoronaVac may provide a scientific basis for optimizing global immunization strategies.
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Affiliation(s)
- Lairun Jin
- School of Public Health, Southeast University, Nanjing, P.R. China
| | - Zhuopei Li
- School of Public Health, Nanjing Medical University, Nanjing, P.R. China
| | - Xiaoyin Zhang
- School of Public Health, Southeast University, Nanjing, P.R. China
| | - Jingxin Li
- National Health Commission (NHC) Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, P.R. China
| | - Fengcai Zhu
- School of Public Health, Southeast University, Nanjing, P.R. China.,National Health Commission (NHC) Key Laboratory of Enteric Pathogenic Microbiology, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, P.R. China
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4
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Yildiz Y, Ozger HS, Senol E, Karakus R, Buyukkoruk M, Altin FB, Ozcan FZ, Yaman M, Oruklu N, Yucel AA, Bagriacik EU. Evaluation of long-term antibody kinetics in healthcare workers vaccinated with inactivated COVID-19 Vero cell vaccine (CoronaVac), a propensity score-matched observational study. Int J Infect Dis 2022; 122:99-106. [PMID: 35568368 PMCID: PMC9093161 DOI: 10.1016/j.ijid.2022.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/04/2022] [Accepted: 05/05/2022] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES This study aimed to evaluate the long-term antibody kinetics after vaccinating with an inactivated COVID-19 Vero cell vaccine (CoronaVac) in healthcare workers (HCWs) at a single center in Turkey. METHODS For this prospective observational study, Chemiluminescence immunoassay (CLIA) and enzyme-linked immunosorbent assay (ELISA) were used for the determination of binding antibodies (bAb) and neutralizing antibodies (nAb), respectively. Antibody kinetics were compared for the potential influencing factors, and propensity score analysis was performed to match the subcohort for age. RESULTS Early bAb and nAb response was achieved in all 343 participants. Titers of bAbs against SARS-CoV-2 on 42 days post-vaccination (dpv) were higher in HCWs who were aged <40 years and who had a history of COVID-19. SARS-CoV-2 bAb levels in HCWs on days 42 (n = 97), 90 (n = 97), and 180 (n = 97) were 175 IU/ml (3.9-250), 107 IU/ml (2.4-250), and 66.1 IU/ml (2.57-250), respectively (p<0.001). SARS-CoV-2 bAb (p<0.001) and nAb (p<0.001) titers decreased significantly over time. There was a high negative correlation between SARS-CoV-2 antibody titers and inverse optic density of nAb responses (Pearson correlation coefficient: -0.738, p<0.001). CONCLUSIONS When the antibody responses were compared, it was seen that the vaccine immunogenicity was better in those who had prior COVID-19 history and were aged <40 years. In the course of time, it was determined that there was a significant decrease in bAb and nAb responses after the 90th day. These results may guide approval decisions for booster COVID-19 vaccines.
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Affiliation(s)
- Yesim Yildiz
- Department of Infectious Diseases and Clinical Microbiology, Gazi University Faculty of Medicine, Ankara, Turkey,Corresponding author: Yesim Yildiz
| | - Hasan Selcuk Ozger
- Department of Infectious Diseases and Clinical Microbiology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Esin Senol
- Department of Infectious Diseases and Clinical Microbiology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Resul Karakus
- Department of Immunology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Merve Buyukkoruk
- Department of Infectious Diseases and Clinical Microbiology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Fatma Betul Altin
- Department of Infectious Diseases and Clinical Microbiology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Fatma Zehra Ozcan
- Department of Infectious Diseases and Clinical Microbiology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Melek Yaman
- Department of Immunology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Nihan Oruklu
- Department of Immunology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Aysegul Atak Yucel
- Department of Immunology, Gazi University Faculty of Medicine, Ankara, Turkey
| | - Emin Umit Bagriacik
- Department of Immunology, Gazi University Faculty of Medicine, Ankara, Turkey
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5
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Jia M, Wang X, Gong W, Zhong J, Leng Z, Ren L, Feng L, Guo L, Gao L, Liang X, Chen E, Tang W, Huang Q, Zhang Q, Jiang G, Zhao S, Liu Z, Feng Y, Qi L, Ma L, Huang T, Yue Y, Wang J, Jiang B, Xu L, Wang J, Yang W, Wang C. Humoral responses after inactivated COVID-19 vaccination in individuals with and without prior SARS-CoV-2 infection: A prospective cohort study. J Med Virol 2022; 94:5746-5757. [PMID: 35941840 PMCID: PMC9537985 DOI: 10.1002/jmv.28055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/04/2022] [Indexed: 01/06/2023]
Abstract
We evaluated and compared humoral immune responses after inactivated coronavirus disease 2019 (COVID-19) vaccination among naïve individuals, asymptomatically infected individuals, and recovered patients with varying severity. In this multicenter, prospective cohort study, blood samples from 666 participants were collected before and after 2 doses of inactivated COVID-19 vaccination. Among 392 severe acute respiratory syndrome coronavirus 2-naïve individuals, the seroconversion rate increased significantly from 51.8% (median antispike protein pan-immunoglobulins [S-Igs] titer: 0.8 U/ml) after the first dose to 96% (median S-Igs titer: 79.5 U/ml) after the second dose. Thirty-two percent of naïve individuals had detectable neutralizing antibodies (NAbs) against the original strain but all of them lost neutralizing activity against the Omicron variant. In 274 individuals with natural infection, humoral immunity was significantly improved after a single vaccine dose, with median S-Igs titers of 596.7, 1176, 1086.5, and 1828 U/ml for asymptomatic infections, mild cases, moderate cases, and severe/critical cases, respectively. NAb titers also improved significantly. However, the second dose did not substantially increase antibody levels. Although a booster dose is needed for those without infection, our findings indicate that recovered patients should receive only a single dose of the vaccine, regardless of the clinical severity, until there is sufficient evidence to confirm the benefits of a second dose.
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Affiliation(s)
- Mengmeng Jia
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Xinming Wang
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Wensheng Gong
- Xiangyang Center for Disease Control & PreventionXiangyangChina
| | - Jingchuan Zhong
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Zhiwei Leng
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Lili Ren
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Luzhao Feng
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Li Guo
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Lidong Gao
- Hunan Provincial Center for Disease Control and PreventionChangshaChina,Hunan Workstation for Emerging Infectious Disease Control and PreventionChinese Academy of Medical SciencesBeijingChina
| | - Xian Liang
- Chengdu Center for Disease Control and PreventionChengduChina
| | - Enfu Chen
- Zhejiang Provincial Center for Disease Control and PreventionZhejiangChina
| | - Wenge Tang
- Chongqing Center for Disease Control and PreventionChongqingChina
| | - Qiangru Huang
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Qiao Zhang
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | | | - Shanlu Zhao
- Hunan Provincial Center for Disease Control and PreventionChangshaChina,Hunan Workstation for Emerging Infectious Disease Control and PreventionChinese Academy of Medical SciencesBeijingChina
| | - Zhu Liu
- Chengdu Center for Disease Control and PreventionChengduChina
| | - Yan Feng
- Zhejiang Provincial Center for Disease Control and PreventionZhejiangChina
| | - Li Qi
- Chongqing Center for Disease Control and PreventionChongqingChina
| | - Libing Ma
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Department of Respiratory and Critical Care MedicineAffiliated Hospital of Guilin Medical UniversityGuilinChina
| | - Tingxuan Huang
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Yong Yue
- Chengdu Center for Disease Control and PreventionChengduChina
| | - Ju Wang
- Chongqing Center for Disease Control and PreventionChongqingChina
| | - Binshan Jiang
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Liuhui Xu
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Jianwei Wang
- NHC Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux LaboratoryInstitute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Key Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical SciencesBeijingChina
| | - Weizhong Yang
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina
| | - Chen Wang
- School of Population Medicine and Public HealthChinese Academy of Medical Sciences & Peking Union Medical CollegeBeijingChina,Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, National Clinical Research Center for Respiratory DiseasesChina‐Japan Friendship HospitalBeijingChina,National Center for Respiratory MedicineBeijingChina,Chinese Academy of EngineeringBeijingChina
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6
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Yavuz E, Günal Ö, Başbulut E, Şen A. SARS-CoV-2 specific antibody responses in healthcare workers after a third booster dose of CoronaVac or BNT162b2 vaccine. J Med Virol 2022; 94:3768-3775. [PMID: 35434796 PMCID: PMC9088656 DOI: 10.1002/jmv.27794] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/18/2022] [Accepted: 04/16/2022] [Indexed: 11/18/2022]
Abstract
The first SARS-CoV-2 vaccination campaign in Turkey has started in mid-January for the healthcare workers (HCWs) with the inactive virus vaccine CoronaVac (Sinovac). After four and a half months, the Turkish Ministry of Health rolled out a booster-dose vaccination campaign for HCWs and all people over 50 years old beginning in July 2021. The individuals eligible were given the choice of either CoronaVac or mRNA vaccine BNT162b2 for the third booster-dose vaccination. This study aimed to evaluate SARS-CoV-2 IgG antibody titers against the S1 subunit of the spike protein as a marker of the humoral response in 179 HCWs who received a third booster dose of either CoronaVac or BNT162b2. A total of 136 HCWs, 71 female (52.2%) and 65 male (47.8%), completed both serum collections on Days 0 and 28. The median SARS-CoV-2 IgG S Protein (SP) titer in all participants before the vaccination was 175.7 AU/ml. Of 136 HCWs, 103 (75.73%) chose BNT162b2 vaccine and 33 (24.26%) chose CoronaVac as the third booster dose. There was a significant difference between the BNT162b2 group and the CoronaVac group in terms of SARS-CoV-2 IgG SP titers (p < 0.001). The median SARS-CoV-2 IgG SP titers in BNT162b2 group (n = 103) and in CoronaVac group (n = 33) were 17619.3 AU/ml and 1153.0 AU/ml, respectively. The third booster dose with BNT162b2 and CoronaVac increased antibody titers in each participant a mean of 162-fold and 9-fold, respectively. HCWs in the BNT162b2 group reported more frequent adverse events than HCWs in the CoronaVac group (p < 0.001).
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Affiliation(s)
- Erdinç Yavuz
- Department of Family MedicineSamsun University School of MedicineSamsunTurkey
| | - Özgür Günal
- Department of Infectious DiseasesSamsun University School of MedicineSamsunTurkey
| | - Eşe Başbulut
- Department of MicrobiologySamsun Training and Research HospitalSamsunTurkey
| | - Ahmet Şen
- Department of AnesthesiologySamsun Training and Research HospitalSamsunTurkey
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7
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Lai FTT, Huang L, Peng K, Li X, Chui CSL, Wan EYF, Wong CKH, Chan EWY, Hung IFN, Wong ICK. Post-Covid-19-vaccination adverse events and healthcare utilization among individuals with or without previous SARS-CoV-2 infection. J Intern Med 2022; 291:864-869. [PMID: 35043503 PMCID: PMC9303328 DOI: 10.1111/joim.13453] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Post-marketing pharmacovigilance data are scant on the safety of Covid-19 vaccines among people with previous SARS-CoV-2 infection compared with ordinary vaccine recipients. We compared the post-vaccination adverse events of special interests (AESI), accident and emergency room (A&E) visit, and hospitalization between these two groups. METHODS We conducted a retrospective cohort study using a territory-wide public healthcare database with population-based vaccination records in Hong Kong. RESULTS In total, 3922 vaccine recipients with previous SARS-CoV-2 infection and 1,137,583 vaccine recipients without previous SARS-CoV-2 infection were included. No significant association was observed between previous SARS-CoV-2 infection and AESI or hospitalization. Previous SARS-CoV-2 infection was significantly associated with a lower risk of A&E visit (CoronaVac: hazard ratios [HR] = 0.56, 95% confidence intervals [CI]: 0.32-0.99; Comirnaty: HR = 0.62, 95% CI: 0.47-0.82). CONCLUSION No safety signal of Covid-19 vaccination was detected from the comparison between vaccine recipients with previous SARS-CoV-2 infection and those without infection.
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Affiliation(s)
- Francisco Tsz Tsun Lai
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.,Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China
| | - Lei Huang
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Kuan Peng
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Xue Li
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China.,Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Celine Sze Ling Chui
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China.,School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.,School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Eric Yuk Fai Wan
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.,Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China.,Department of Family Medicine and Primary Care, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Carlos King Ho Wong
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.,Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China.,Department of Family Medicine and Primary Care, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Esther Wai Yin Chan
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.,Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China
| | - Ivan Fan Ngai Hung
- Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ian Chi Kei Wong
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.,Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong Science and Technology Park, Hong Kong SAR, China.,Research Department of Practice and Policy, School of Pharmacy, University College London, London, United Kingdom
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8
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Bilgin H, Marku M, Yilmaz SS, Karahasan Yagci A, Sili U, Can B, Can Sarinoglu R, Mulazimoglu Durmusoglu L, Haklar G, Sirikci O, Eksioglu Demiralp E. The effect of immunization with inactivated SARS-CoV-2 vaccine (CoronaVac) and/or SARS-CoV-2 infection on antibody levels, plasmablasts, long-lived-plasma-cells, and IFN-γ release by natural killer cells. Vaccine 2022; 40:2619-2625. [PMID: 35339303 PMCID: PMC8930391 DOI: 10.1016/j.vaccine.2022.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 02/25/2022] [Accepted: 03/01/2022] [Indexed: 01/17/2023]
Abstract
OBJECTIVES We evaluated the antibody response, natural killer cell response and B cell phenotypes in healthcare workers (HCW) who are vaccinated with two doses of CoronaVac with or without documented SARS-CoV-2 infection and unvaccinated HCWs with SARS-CoV-2 infection. METHODS HCWs were divided into four groups: vaccine only (VO), vaccine after SARS-CoV-2 infection (VAI), SARS-CoV-2 infection only (IO), and SARS-CoV-2 infection after vaccine (IAV). Anti-SARS-CoV-2 spike protein (Anti-S) antibodies were measured by Elecsys Anti-SARS-CoV-2 S ELISA kit. Memory B cells (CD19+CD27+), plasmablast B cells (CD19+CD138+) and long-lived plasma cells (LLPC; CD138+CD19-) were measured by flow cytometry in 74 patients. Interferon gamma (IFN-γ) release by natural killer (NK) cells were measured by NKVue Test (NKMAX, Republic of Korea) in 76 patients. RT-PCR was performed with Bio-speedy® COVID-19 qPCR detection kit, Version 2 (Bioexen LTD, Istanbul, Turkey). RESULTS The Anti-S antibodies were detectable in all HCWs (n: 224). The median Anti-S titers (BAU/mL) was significantly higher in VAI (620 25-75% 373-1341) compared to VO (136, 25-75% 85-283) and IO (111, 25-75% 54-413, p < 0.01). VAI group had significantly lower percentage of plasmablasts (2.9; 0-8.7) compared to VO (6.8; 3.5-12.0) and IO (9.9; 4.7-47.5, p < 0.01) (n:74). Percentage of LLPCs in groups VO, VAI and IO was similar. There was no difference of IFN-γ levels between the study groups (n: 76). CONCLUSION The antibody response was similar between uninfected vaccinated HCWs and unvaccinated HCWs who had natural infection. HCWs who had two doses of CoronaVac either before or after the natural SARS-CoV-2 infection elicited significantly higher antibody responses compared to uninfected vaccinated HCWs. The lower percentages of plasmablasts in the VAI group may indicate their migration to lymph nodes and initiation of the germinal center reaction phase. IFN-γ response did not differ among the groups.
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Affiliation(s)
- Huseyin Bilgin
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | - Marisa Marku
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | - Sultan Seval Yilmaz
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | | | - Uluhan Sili
- Marmara University, School of Medicine, Department of Infectious Diseases and Clinical Microbiology, Istanbul, Turkey
| | - Baris Can
- Marmara University, School of Medicine, Department of Microbiology, Istanbul, Turkey
| | - Rabia Can Sarinoglu
- Marmara University, School of Medicine, Department of Microbiology, Istanbul, Turkey
| | | | - Goncagul Haklar
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey
| | - Onder Sirikci
- Marmara University, School of Medicine, Department of Biochemistry, Istanbul, Turkey,Corresponding author at: Fevzi Cakmak Mah Muhsinyazicioglu Cad No: 10 Marmara University Pendik Hospital, 34899 Istanbul, Turkey
| | - Emel Eksioglu Demiralp
- Istanbul Memorial Şişli Hospital, Tissue Typing and Immunology Laboratory, Istanbul, Turkey
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9
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McIntyre PB, Aggarwal R, Jani I, Jawad J, Kochhar S, MacDonald N, Madhi SA, Mohsni E, Mulholland K, Neuzil KM, Nohynek H, Olayinka F, Pitisuttithum P, Pollard AJ, Cravioto A. COVID-19 vaccine strategies must focus on severe disease and global equity. Lancet 2022; 399:406-410. [PMID: 34922639 PMCID: PMC8676417 DOI: 10.1016/s0140-6736(21)02835-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 12/06/2021] [Indexed: 02/04/2023]
Affiliation(s)
- Peter B McIntyre
- Department of Women's and Children's Health, University of Otago, Dunedin, New Zealand.
| | - Rakesh Aggarwal
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Ilesh Jani
- Instituto Nacional de Saúde, Marracuene, Mozambique
| | | | - Sonali Kochhar
- Department of Global Health, School of Public Health and Community Medicine, University of Washington, Seattle, WA, USA
| | - Noni MacDonald
- Dalhousie Medical School, Dalhousie University, Halifax, NS, Canada
| | - Shabir A Madhi
- South African Medical Research Council Vaccine and Infectious Diseases Analytics Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | | | - Kim Mulholland
- Department of Epidemiology and Public Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Kathleen M Neuzil
- Center for Vaccine Development and Global Health, School of Medicine, University of Maryland, Baltimore, MD, USA
| | - Hanna Nohynek
- Department of Health Security, Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Folake Olayinka
- STAR Fellows Department, Public Health Institute, Washington DC, USA
| | - Punnee Pitisuttithum
- Department of Clinical Tropical Medicine and the Vaccine Trial Centre, Mahidol University, Nakhon Pathom, Bangkok
| | | | - Alejandro Cravioto
- Department of Public Health, National Autonomous University of Mexico, Mexico City, Mexico
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10
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Wang M, Yang Q, Zhu L, Jin L. Investigating Impacts of CoronaVac Vaccination in Males on In Vitro Fertilization: A Propensity Score Matched Cohort Study. World J Mens Health 2022; 40:570-579. [PMID: 36047069 PMCID: PMC9482860 DOI: 10.5534/wjmh.220017] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/28/2022] [Accepted: 04/17/2022] [Indexed: 11/20/2022] Open
Abstract
Purpose This study aimed to evaluate the influences of SARS-CoV-2 vaccination (CoronaVac) on male fertility and investigate the impact of a history of the CoronaVac vaccination in males on gamete and embryo development and in vitro fertilization (IVF) outcomes. Materials and Methods A prospective cohort study enrolled couples undergoing IVF cycles between June and August 2021 at Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology in China. According to the history of SARS-CoV-2 vaccination in males, the participants were divided into the vaccination group and the non-vaccination group. A self-controlled study of semen analyses for males before and after CoronaVac vaccination was conducted. Baseline characteristics were matched using propensity score matching. Participants were categorized into the unexposed group (non-vaccination) and exposed group (vaccination), and the population was 271 for each. Semen parameters and IVF outcomes were the main outcomes. Results Generally, no statistically significant differences were exhibited between the matched cohorts regarding embryo developmental parameters, including fertilization rate, cleavage rate, high-quality embryo rate, blastocyst formation rate, and available blastocyst rate, as well as clinical outcomes, such as implantation rate, biochemical pregnancy rate, and clinical pregnancy rate. Moreover, males after vaccination seemed to have fluctuating semen parameters including increased semen volume, lower motility, and decreased normal forms of sperm, while the motile sperm counts were similar. In addition, all semen parameters were above the lower reference limits. Conclusions Our findings suggested that CoronaVac vaccinations in males may not have adverse effects on patient performance or the gamete and embryonic development potential during assisted reproductive technology (ART) treatments.
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Affiliation(s)
- Meng Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qiyu Yang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lixia Zhu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lei Jin
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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11
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Khandker SS, Godman B, Jawad MI, Meghla BA, Tisha TA, Khondoker MU, Haq MA, Charan J, Talukder AA, Azmuda N, Sharmin S, Jamiruddin MR, Haque M, Adnan N. A Systematic Review on COVID-19 Vaccine Strategies, Their Effectiveness, and Issues. Vaccines (Basel) 2021; 9:1387. [PMID: 34960133 PMCID: PMC8708628 DOI: 10.3390/vaccines9121387] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 12/13/2022] Open
Abstract
COVID-19 vaccines are indispensable, with the number of cases and mortality still rising, and currently no medicines are routinely available for reducing morbidity and mortality, apart from dexamethasone, although others are being trialed and launched. To date, only a limited number of vaccines have been given emergency use authorization by the US Food and Drug Administration and the European Medicines Agency. There is a need to systematically review the existing vaccine candidates and investigate their safety, efficacy, immunogenicity, unwanted events, and limitations. The review was undertaken by searching online databases, i.e., Google Scholar, PubMed, and ScienceDirect, with finally 59 studies selected. Our findings showed several types of vaccine candidates with different strategies against SARS-CoV-2, including inactivated, mRNA-based, recombinant, and nanoparticle-based vaccines, are being developed and launched. We have compared these vaccines in terms of their efficacy, side effects, and seroconversion based on data reported in the literature. We found mRNA vaccines appeared to have better efficacy, and inactivated ones had fewer side effects and similar seroconversion in all types of vaccines. Overall, global variant surveillance and systematic tweaking of vaccines, coupled with the evaluation and administering vaccines with the same or different technology in successive doses along with homologous and heterologous prime-booster strategy, have become essential to impede the pandemic. Their effectiveness appreciably outweighs any concerns with any adverse events.
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Affiliation(s)
- Shahad Saif Khandker
- Gonoshasthaya-RNA Molecular Diagnostic & Research Center, Dhanmondi, Dhaka 1205, Bangladesh; (S.S.K.); (M.U.K.); (M.A.H.); (M.R.J.)
| | - Brian Godman
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G1 1XQ, UK;
- Division of Public Health Pharmacy and Management, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
- Centre of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 346, United Arab Emirates
| | - Md. Irfan Jawad
- Department of Microbiology, Jahangirnagar University, Savar 1342, Bangladesh; (M.I.J.); (B.A.M.); (T.A.T.); (A.A.T.); (N.A.)
| | - Bushra Ayat Meghla
- Department of Microbiology, Jahangirnagar University, Savar 1342, Bangladesh; (M.I.J.); (B.A.M.); (T.A.T.); (A.A.T.); (N.A.)
| | - Taslima Akter Tisha
- Department of Microbiology, Jahangirnagar University, Savar 1342, Bangladesh; (M.I.J.); (B.A.M.); (T.A.T.); (A.A.T.); (N.A.)
| | - Mohib Ullah Khondoker
- Gonoshasthaya-RNA Molecular Diagnostic & Research Center, Dhanmondi, Dhaka 1205, Bangladesh; (S.S.K.); (M.U.K.); (M.A.H.); (M.R.J.)
- Department of Community Medicine, Gonoshasthaya Samaj Vittik Medical College, Savar 1344, Bangladesh
| | - Md. Ahsanul Haq
- Gonoshasthaya-RNA Molecular Diagnostic & Research Center, Dhanmondi, Dhaka 1205, Bangladesh; (S.S.K.); (M.U.K.); (M.A.H.); (M.R.J.)
| | - Jaykaran Charan
- Department of Pharmacology, All India Institute of Medical Sciences, Jodhpur 342005, India;
| | - Ali Azam Talukder
- Department of Microbiology, Jahangirnagar University, Savar 1342, Bangladesh; (M.I.J.); (B.A.M.); (T.A.T.); (A.A.T.); (N.A.)
| | - Nafisa Azmuda
- Department of Microbiology, Jahangirnagar University, Savar 1342, Bangladesh; (M.I.J.); (B.A.M.); (T.A.T.); (A.A.T.); (N.A.)
| | - Shahana Sharmin
- Department of Pharmacy, BRAC University, Dhaka 1212, Bangladesh;
| | - Mohd. Raeed Jamiruddin
- Gonoshasthaya-RNA Molecular Diagnostic & Research Center, Dhanmondi, Dhaka 1205, Bangladesh; (S.S.K.); (M.U.K.); (M.A.H.); (M.R.J.)
- Department of Pharmacy, BRAC University, Dhaka 1212, Bangladesh;
| | - Mainul Haque
- The Unit of Pharmacology, Faculty of Medicine and Defence Health, Universiti Pertahanan Nasional Malaysia (National Defence University of Malaysia), Kem Perdana Sugai Besi, Kuala Lumpur 57000, Malaysia
| | - Nihad Adnan
- Gonoshasthaya-RNA Molecular Diagnostic & Research Center, Dhanmondi, Dhaka 1205, Bangladesh; (S.S.K.); (M.U.K.); (M.A.H.); (M.R.J.)
- Department of Microbiology, Jahangirnagar University, Savar 1342, Bangladesh; (M.I.J.); (B.A.M.); (T.A.T.); (A.A.T.); (N.A.)
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Vicenti I, Gatti F, Scaggiante R, Boccuto A, Zago D, Basso M, Dragoni F, Parisi SG, Zazzi M. BNT162b2 SARS-CoV-2 Vaccination Elicits High Titers of Neutralizing Antibodies to Both B.1 and P.1 Variants in Previously Infected and Uninfected Subjects. Life (Basel) 2021; 11:896. [PMID: 34575045 PMCID: PMC8470771 DOI: 10.3390/life11090896] [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: 07/06/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/16/2022] Open
Abstract
We aimed to investigate neutralizing antibody titers (NtAbT) to the P.1 and B.1 SARS-CoV-2 variants in a cohort of healthy health care workers (HCW), including 20 previously infected individuals tested at baseline (BLinf, after a median of 298 days from diagnosis) and 21 days after receiving one vaccine dose (D1inf) and 15 uninfected subjects tested 21 days after the second-dose vaccination (D2uninf). All the subjects received BNT162b2 vaccination. D1inf NtAbT increased significantly with respect to BLinf against both B.1 and P.1 variants, with a fold-change significantly higher for P.1. D1inf NtAbT were significantly higher than D2uninf NtAbT, against B.1 and P.1. NtAbT against the two strains were highly correlated. P.1 NtAbT were significantly higher than B.1 NtAbT. This difference was significant for post-vaccination sera in infected and uninfected subjects. A single-dose BNT162b2 vaccination substantially boosted the NtAb response to both variants in the previously infected subjects. NtAb titers to B.1 and P.1 lineages were highly correlated, suggesting substantial cross-neutralization. Higher titers to the P.1 than to the B.1 strain were driven by the post-vaccination titers, highlighting that cross-neutralization can be enhanced by vaccination.
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Affiliation(s)
- Ilaria Vicenti
- Department of Medical Biotechnologies, University of Siena, Viale Bracci, 16, 53100 Siena, Italy; (I.V.); (A.B.); (F.D.); (M.Z.)
| | - Francesca Gatti
- Department of Molecular Medicine, University of Padova, Via Gabelli, 63, 35100 Padova, Italy; (F.G.); (D.Z.); (M.B.)
| | | | - Adele Boccuto
- Department of Medical Biotechnologies, University of Siena, Viale Bracci, 16, 53100 Siena, Italy; (I.V.); (A.B.); (F.D.); (M.Z.)
| | - Daniela Zago
- Department of Molecular Medicine, University of Padova, Via Gabelli, 63, 35100 Padova, Italy; (F.G.); (D.Z.); (M.B.)
| | - Monica Basso
- Department of Molecular Medicine, University of Padova, Via Gabelli, 63, 35100 Padova, Italy; (F.G.); (D.Z.); (M.B.)
| | - Filippo Dragoni
- Department of Medical Biotechnologies, University of Siena, Viale Bracci, 16, 53100 Siena, Italy; (I.V.); (A.B.); (F.D.); (M.Z.)
| | - Saverio Giuseppe Parisi
- Department of Molecular Medicine, University of Padova, Via Gabelli, 63, 35100 Padova, Italy; (F.G.); (D.Z.); (M.B.)
| | - Maurizio Zazzi
- Department of Medical Biotechnologies, University of Siena, Viale Bracci, 16, 53100 Siena, Italy; (I.V.); (A.B.); (F.D.); (M.Z.)
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