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Smith SE, Sivertsen N, Lines L, De Bellis A. Exploring social media influences on vaccine decision-making in parents: a netnography. Ther Adv Vaccines Immunother 2024; 12:25151355241249607. [PMID: 38726045 PMCID: PMC11080448 DOI: 10.1177/25151355241249607] [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: 07/09/2023] [Accepted: 03/28/2024] [Indexed: 05/12/2024] Open
Abstract
Background Immunization is one of the most significant health initiatives of recent times. Despite this, vaccine hesitancy is increasing and was listed as one of the top 10 threats to global health by the World Health Organization in 2019. A major factor associated with vaccine hesitancy is thought to be the viral spread of misinformation by a small but active anti-vaccination movement. Objectives The purpose of this study was to explore the influences of social media on vaccine decision-making in parents. Design This study is part of a larger body of research that explored vaccine decision-making in parents. Other methods included were an online survey and semi-structured interviews. This study investigated the influence of cyberculture on parents in an online environment. Method This study employed netnography, a form of qualitative inquiry with its roots in ethnography as methodology and a purpose-designed Facebook page as the means of exploring a purpose-designed online community with a particular focus on the culture, belief systems and influences present. Both manual and computer-assisted thematic analyses were used to analyse the data obtained. Results Three key themes were identified in this study. These included vaccine safety concerns, the emotional debate and COVID-19-specific issues. The results indicated the presence of strong anti-vaccination sentiment combined with an 'infodemic' of conspiracy theories, misinformation and vitriol with the potential to negatively impact parents seeking immunization information. Conclusion Given the popularity and accessibility of social media and the ready access to misinformation present online, it is evident that parental vaccine decision-making may be impacted adversely. Therefore, it is important that healthcare professionals are aware of this and provide adequate and timely education prior to parents seeking information on social media.
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Affiliation(s)
- Susan E. Smith
- College of Nursing and Health Science, Flinders University, P.O. Box 573, Stirling, SA 5154, Australia
| | - Nina Sivertsen
- College of Nursing and Health Science, Flinders University, Adelaide, SA, Australia
- Rural and Remote Arctic Health, UiT The Arctic University of Norway, Tromsø, Norway
| | - Lauren Lines
- College of Nursing and Health Science, Flinders University, Adelaide, SA, Australia
| | - Anita De Bellis
- College of Nursing and Health Science, Flinders University, Adelaide, SA, Australia
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McCarron SA, Bradley DT, Hart ND. A scoping review of the reasons for and approaches to non-uptake of pertussis and influenza vaccinations in pregnant women in the United Kingdom and Ireland. BMC Pregnancy Childbirth 2023; 23:857. [PMID: 38087222 PMCID: PMC10717507 DOI: 10.1186/s12884-023-06171-7] [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: 08/16/2023] [Accepted: 12/03/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Pertussis and influenza cause significant morbidity and mortality in pregnancy and the neonatal period. Maternal vaccination in pregnancy would reduce harm, but low vaccine uptake is a concern. This scoping review aimed to understand the reasons for, and approaches, to non-uptake of pertussis and influenza vaccinations in pregnant women in the UK and Ireland. METHODS The inclusion criteria of this scoping review consist of pregnant women who avail of pertussis and influenza vaccines in the UK and Ireland. MEDLINE, EMBASE, Web of Science and CINAHL databases were searched in June 2021 and updated in October 2022. Searches were limited to English language reports published after 2011. We followed the Joanna Briggs Institute guidance on scoping reviews. Data were extracted and charted. RESULTS Five themes emerged from the literature. Acceptability, as well as organisational and awareness issues, were overarching themes regarding reasons for and approaches to non-uptake of the vaccines respectively. Other themes included healthcare professional factors, information interpretation and pregnancy-related factors. CONCLUSIONS Women need clear, comprehensible information, ideally provided by their healthcare professionals, in a way that is meaningful and addresses their circumstances and risk perceptions. This research will serve as a base for future work that aims behaviour science interventions at the wider pregnant population as well as the target groups that have been identified in this review.
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Smith SE, Sivertsen N, Lines L, De Bellis A. Pushed to the Fringe - The Impact of Vaccine Hesitancy on Children and Families. Compr Child Adolesc Nurs 2023; 46:262-276. [PMID: 37318539 DOI: 10.1080/24694193.2023.2222815] [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: 03/06/2023] [Accepted: 05/19/2023] [Indexed: 06/16/2023]
Abstract
Vaccine hesitancy has been described as any delay or refusal of vaccines despite their availability and is increasing in Australia and other middle to high-income countries. The aim of this study is to gain a deep understanding of the experiences and influences on vaccine hesitant children and their families. A qualitative interview approach was undertaken with vaccine hesitant parents and pregnant women (n = 12). Semi-structured interviews were conducted by telephone. Inductive thematic analysis was undertaken on data obtained using the guidelines of Braun and Clarke. Three main themes were identified in this study, including Pushed to the fringe; A culture of Distrust; and Coerced choices. The study revealed that vaccine hesitant parents felt isolated and pushed to the fringe of society. They also expressed dissatisfaction with the Australian "No Jab - No Pay" and "No Jab - No Play" legislation. This contributed to feelings of marginalization. Participants also cited a breakdown in the therapeutic relationships, which impacted their child's health. Additionally, a lack of sufficient information was received to achieve informed consent. These results suggest that there is a need for enhanced education for some health-care professionals, many of whom have reported being confronted by conversations with vaccine hesitant parents.
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Affiliation(s)
- Susan E Smith
- College of Nursing and Health Science, Flinders University, Adelaide, South Australia
| | - Nina Sivertsen
- Rural and Remote Arctic Health, Campus Hammersfest, Flinders University and Arctic University of Norway, Adelaide, South Australia
| | - Lauren Lines
- Flinders University, Bedford Park, South Australia
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Taneja S, Panday J, Popoola A, Greyson D, McDonald SD, Patel T, Vanstone M. Making informed choices about cannabis use during pregnancy and lactation: A qualitative study of information use. Birth 2023; 50:504-512. [PMID: 35848512 DOI: 10.1111/birt.12668] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 06/28/2022] [Accepted: 07/05/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Cannabis use during pregnancy and lactation continues to increase as some perceive cannabis to be helpful for symptom management and coping. As such, pregnant and lactating people are faced with challenging decisions, weighing benefits against the potential risks of cannabis use. To help clinicians facilitate informed choices, we explored the self-identified information needs of pregnant and lactating people who are deciding whether or not to use cannabis. We aimed to describe the modes and sources of their information-seeking and their satisfaction with the information they found. METHODS We interviewed 52 people in Canada who made the decision to start, stop, or continue using cannabis during pregnancy and lactation. Participants were recruited from advertisements in prenatal clinics and on social media. We utilized an inductive approach to analysis focused on information used in decision-making about cannabis use, including the process of seeking and evaluating that information. RESULTS Participants were deliberate in their search for information, most commonly seeking information on risks of use. Information sources were mainly online material or people in their social networks. Clinicians were not commonly described as a knowledgeable or supportive source of information. Overwhelmingly, participants described the information they found as insufficient and emphasized the need for more comprehensive and trustworthy sources of information. CONCLUSIONS Participants identified distinct and unmet information needs associated with their decision to use cannabis. They described a desire for clear evidence about the impact of cannabis use, including information about how to balance the benefits they perceived from cannabis use with the risks of harm.
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Affiliation(s)
- Shipra Taneja
- Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Janelle Panday
- Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Anuoluwa Popoola
- Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Devon Greyson
- School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sarah D McDonald
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Radiology and Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada
| | - Tejal Patel
- Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Meredith Vanstone
- Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada
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Ashour HA, Alhinti SF, Hawsaoi SA, Alsuwailem AA, AlFarhan A, Abdulmajeed I. Knowledge, Attitude, and Practice (KAP) of COVID-19 Vaccine Among Saudi Mothers. Cureus 2023; 15:e36826. [PMID: 37123733 PMCID: PMC10139822 DOI: 10.7759/cureus.36826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND The coronavirus disease 2019 (COVID-19) vaccine is a novel vaccine that was created during the midst of the COVID-19 pandemic in 2020 to combat the highly contagious COVID-19 infection. Since the initiation of vaccine administration campaigns globally, lots of research was simultaneously being done to study the vaccine's side effects and possible complications, especially in vulnerable groups such as pregnant women and children. Saudi Arabia is one of the leading countries in administering the COVID-19 vaccine to its population. However, due to the exchange of a lot of incorrect information through social media platforms about the vaccine's safety, people, particularly women expecting a child, breastfeeding, or having younger children, started to display some vaccine hesitancy. This study aims to assess the knowledge, attitude, and practice (KAP) of the COVID-19 vaccine among Saudi mothers and to recognize how certain individual characteristics affect it. METHODS This is an observational cross-sectional study that was carried out among 293 Saudi mothers attending primary healthcare clinics at King Abdulaziz Medical City (KAMC), Riyadh, Saudi Arabia from April 2022 to July 2022. The participants completed a pre-validated self-administered questionnaire that was composed of 39 closed-response questions divided into four sections: participant characteristics, knowledge, attitude, and practice towards the COVID-19 vaccine. The English questionnaire was translated to Arabic, retranslated back to English, and then compared to the first English version by a different translator to ensure translation accuracy. A pilot study was conducted on 20 participants before the survey was distributed for data collection. Statistical analysis was done using SPSS version 23.0 (IBM Corp., Armonk, NY). The association between the four sections of the questionnaire was assessed using Chi-square test of proportion. Results: The study found that 64% of the participants were below the age of 40. The majority (56%) have earned a bachelor's or a higher degree. According to 41%, "Ministry of Health official channels" was the most important source of COVID-19 vaccine-related information. Almost half of the respondents (45%) showed to have an excellent knowledge of the COVID-19 vaccine and 62% showed to have a positive attitude towards it. Around 40% of the participants reported that they delayed taking the COVID-19 vaccine until it was mandatory. For those who have children aged between 12 and 18 years, 78% stated that their children took the COVID-19 vaccine. Mothers aged below 40 years showed to have significantly better vaccine knowledge compared to the older group. Mothers who received the influenza vaccine over the past three years were less likely to delay taking the COVID-19 vaccine until it became mandatory compared to those who did not receive it. Conclusion: Younger age, higher educational level, flu vaccine administration in the previous three years, and adherence to child immunization schedules were all factors that had a significant impact on the KAP towards the COVID-19 vaccine. Correcting misunderstandings about vaccine safety through educational campaigns and providing timely information through the Ministry of Health channels can all contribute to achieving better practice related to vaccine uptake in this group.
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Affiliation(s)
- Hadeel A Ashour
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences College of Medicine, Riyadh, SAU
| | - Sara F Alhinti
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences College of Medicine, Riyadh, SAU
| | - Samira A Hawsaoi
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences College of Medicine, Riyadh, SAU
| | - Arwa A Alsuwailem
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences College of Medicine, Riyadh, SAU
| | - Ali AlFarhan
- Family Medicine and Primary Health Care, Ministry of the National Guard - Health Affairs, Riyadh, SAU
| | - Imad Abdulmajeed
- Family Medicine and Primary Health Care, King Abdulaziz Medical City Riyadh, Riyadh, SAU
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Smith SE, Sivertsen N, Lines L, De Bellis A. Decision making in vaccine hesitant parents and pregnant women - An integrative review. INTERNATIONAL JOURNAL OF NURSING STUDIES ADVANCES 2022; 4:100062. [PMID: 38745627 PMCID: PMC11080481 DOI: 10.1016/j.ijnsa.2022.100062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 01/03/2022] [Accepted: 01/14/2022] [Indexed: 12/01/2022] Open
Abstract
Objectives : Vaccine refusal is increasing in Australia and is a major concern in high- and middle-income countries. There is evidence to suggest that some parents, even those who elect to immunise, may be vaccine hesitant with some manipulating the schedule by excluding or delaying some vaccines. The aim of this review was to gain an understanding of factors that influence vaccine decision-making in pregnant women and parents of children. Design : An integrative review approach was used to produce an analysis of existing literature on vaccine decision-making in pregnancy and parents. As the broadest of review methods, an integrative review can include a range of experimental and non-experimental research, thereby ensuring the inclusion of data from multiple perspectives. Data Sources : Online databases were searched for research related to vaccine decision-making in pregnant women and parents. Original and review articles were sought that were published in English between 2015 and 2021. Reviewed articles included qualitative and quantitative studies and systematic reviews. No mixed methods papers were located or excluded from this review. Review methods : The review method was an integrative review informed by Coughlan. Results : Papers from thirteen predominantly high- and middle-income countries were selected for this review. A total of 31 articles fit the inclusion/exclusion criteria, including qualitative, quantitative and review articles. Three main themes were identified including the role of healthcare professionals, vaccine safety concerns and alternative influences. Alternative influences included: social media, friends and family, religion, conspiracy theories and salutogenic parenting. Findings suggest that high levels of anxiety are involved in vaccine decision-making with parents seeking information from multiple sources including healthcare professionals, friends and family and social media. Conclusions : Pregnancy is an ideal time to provide education on both pregnancy and childhood vaccinations. However, some parents reported dissatisfaction in their therapeutic relationships with healthcare professionals. As a result, parents can resort to their own information seeking, in the main via social media which has been linked to vaccine refusal. Additionally, some healthcare professionals report feeling inadequately prepared for the role of immunisation promotion and provision. Parental information seeking from non-traditional sources has been shown to result in the acquisition of misinformation, exposure to conspiracy theories, the inevitable loss of vaccine confidence and subsequent vaccine refusal.
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Affiliation(s)
- Susan E Smith
- Flinders University College of nursing and health science, Australia
| | - Nina Sivertsen
- Flinders University College of nursing and health science, Australia
- Arctic University of Norway, Rural and Remote Arctic Health, Campus Hammersfest
| | - Lauren Lines
- Flinders University College of nursing and health science, Australia
| | - Anita De Bellis
- Flinders University College of nursing and health science, Australia
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Demir R, Kaya Odabaş R. A systematic review to determine the anti-vaccination thoughts of pregnant women and the reasons for not getting vaccinated. J OBSTET GYNAECOL 2022; 42:2603-2614. [PMID: 36018038 DOI: 10.1080/01443615.2022.2114327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The aim of this study was to determine the anti-vaccination thoughts of pregnant women and the reasons for not getting vaccinated. In this study, data was obtained by retrospectively scanning the cross-sectional and qualitative studies published in the databases of 'PubMed, Cochrane, EBSCOhost, ULAKBİM and Google Scholar' in Turkish and English languages between 2011-2021. The PRISMA method was used in the preparation of the systematic review. In the studies reviewed, it was determined that the rate of pregnant women who were against the vaccine ranged from 6.2% to 98.6%, and the opinions of pregnant women against vaccination and the reasons for not getting vaccinated are presented under seven themes. The results of the study were considered important in terms of showing that quality and important studies were carried out in the literature on the subject and that the data were presented.IMPACT STATEMENTWhat is already known on this subject? Today, with the global coronavirus pandemic, vaccines and their effects are on the agenda again. Especially in pregnant women, opposition to vaccination and not getting vaccinated have emerged for various reasons.What do the results of this study add? The anti-vaccine thoughts of the pregnant women and the reasons for not getting vaccinated were mostly as follows: insufficient level of knowledge, mistrust of vaccines, perception of low infection risk, misconceptions and beliefs about the safety, content, side effects and efficacy of vaccines, worry and fear about the side effects of vaccines, the thought that the vaccine will harm herself and the baby, causes arising from healthcare professionals, financial, temporal and logistical barriers.What the implications are of these findings for clinical practice and/or further research? Scientific studies that can provide comprehensive and strong evidence about vaccine hesitancy and its causes, methods of increasing social approval in vaccination, and solutions should be proposed in the light of these researches in the fight against vaccine rejection.
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Affiliation(s)
- Rukiye Demir
- Department of Midwifery, Faculty of Health Sciences, Canakkale Onsekiz Mart University, Canakkale, Turkiye
| | - Resmiye Kaya Odabaş
- Department of Midwifery, Faculty of Health Sciences, Kocaeli University, Kocaeli, Turkiye
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Meldgaard M, Jensen AL, Johansen AD, Maimburg RD, Maindal HT. Health literacy and related behaviour among pregnant women with obesity: a qualitative interpretive description study. BMC Pregnancy Childbirth 2022; 22:712. [PMID: 36123636 PMCID: PMC9483451 DOI: 10.1186/s12884-022-05023-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 09/02/2022] [Indexed: 11/29/2022] Open
Abstract
Background Obesity in pregnant women is increasing worldwide, affecting the health of both mother and baby. Obesity may be associated with inadequate health literacy, a central competence when navigating antenatal health information and services. This study explores women’s health literacy by examining their knowledge, motivation and skills to access, understand and evaluate health information and the related behaviour among a sample of pregnant women with a prepregnant body mass index (BMI) > 25 kg/m2. Methods An inductive, qualitative study using an interpretive description methodology. Data was collected through ten semi-structured interviews with pregnant women with a prepregnancy BMI > 25 kg/m2 attending antenatal care at the midwifery clinic at Aarhus University Hospital in the Central Denmark Region. Results Pregnant women with obesity understand general health information provided by health professionals, but translating this knowledge into specific healthy behaviours presents a challenge. Although difficulties navigating booking systems and available digital services contribute to this problem, apps can help facilitate navigation. However, successful navigation may depend on adequate e-health literacy. Conflicting information from health professionals, social media and families also present a challenge for pregnant women, requiring a broad skillset for critical evaluation and resolution. Conclusions Adequate health literacy is necessary for pregnant women receiving antenatal care to (i) translate general health information into personalised healthy behaviour, (ii) access and navigate complex and digitalised systems, and (iii) critically evaluate conflicting information. Person-centred differentiation in the organisation of antenatal care may benefit vulnerable pregnant women with inadequate health literacy. Trial registration The study was registered cf. General Data Protection Regulation, Aarhus University Journal number 2016–051-000001, serial number 1934. Supplementary Information The online version contains supplementary material available at 10.1186/s12884-022-05023-0.
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Affiliation(s)
- Maiken Meldgaard
- Department of Public Health, Aarhus University, Aarhus, Denmark.
| | | | | | - Rikke Damkjær Maimburg
- Department of Clinical Medicine & Department of Obstetrics and Gynaecology, Aarhus University Hospital, Aarhus, Denmark.,School of Nursing and Midwifery, Western Sydney University, Sydney, Australia
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de Munter AC, Hautvast JL, Ruijs WL, Henri Spaan D, Hulscher ME, Ruiter RA. Deciding about maternal pertussis vaccination: associations between intention, and needs and values in a vaccine-hesitant religious group. Vaccine 2022; 40:5213-5222. [DOI: 10.1016/j.vaccine.2022.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 07/02/2022] [Accepted: 07/20/2022] [Indexed: 10/16/2022]
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Weighing up the risks — Vaccine decision-making in pregnancy and parenting. Women Birth 2022; 35:547-552. [DOI: 10.1016/j.wombi.2022.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/04/2022] [Accepted: 02/11/2022] [Indexed: 11/23/2022]
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Simas C, Larson HJ, Paterson P. "Saint Google, now we have information!": a qualitative study on narratives of trust and attitudes towards maternal vaccination in Mexico City and Toluca. BMC Public Health 2021; 21:1170. [PMID: 34144703 PMCID: PMC8212502 DOI: 10.1186/s12889-021-11184-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/28/2021] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Maternal vaccination is key to decreasing maternal and infant mortality globally. Yet perceptions about maternal vaccines and immunization among pregnant women are often understudied, particularly in low- and middle- income countries. This qualitative study explored trust, views, and attitudes towards maternal immunization among pregnant women in Mexico. A total of 54 women from Mexico City and Toluca participated in the in-depth interviews and focus groups. We explored participants' experiences with maternal vaccination, as well as how they navigated the health system, searched for information, and made decisions around maternal immunization. RESULTS Our findings point to issues around access and quality of maternal healthcare, including immunizations services. While healthcare professionals were recognized for their expertise, participants reported not receiving enough information to make informed decisions and used online search engines and digital media to obtain more information about maternal healthcare. Some participants held strong doubts over the benefits of vaccination and were hesitant about the safety and efficacy of maternal vaccines. These concerns were also shared by pregnant women who had been vaccinated. Some participants disclosed low levels of trust in government and vaccination campaigns. CONCLUSION Pregnant women, soon to be parents and making vaccination decisions for their child, constitute an important target group for policymakers seeking optimal maternal as well as childhood immunization coverage. Our findings highlight the importance of targeted communication, trust-building and engagement strategies to strengthen confidence in immunization amongst this group.
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Affiliation(s)
- Clarissa Simas
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.
| | - Heidi J Larson
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
- Department of Health Metrics Sciences, University of Washington, Seattle, USA
| | - Pauline Paterson
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
- National Institute for Health Research Health Protection Research Unit (NIHR-HPRU) in Immunisation, London School of Hygiene and Tropical Medicine in partnership with Public Health England, London, UK
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