Funding for this research was provided by:
Wellcome Trust (106158/Z/14/ Z, 106158/Z/14/ Z, 106158/Z/14/ Z)
Bill and Melinda Gates Foundation
Received: 5 May 2020
Accepted: 1 July 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: Ethics approval was obtained from the Oxford Tropical Research Ethics Committee (OxTREC 586–16) and local institutional approval from the Institutional Ethics Committee (IEC) at St John’s Research Institute (140/216) and Health Ministry’s Screening Committee, India.
: Appropriate consent has been taken for cases where individual level has been presented. The cases have been anonymised, and only relevant data has been presented.
: AJP chairs the UK Department of Health and Social Care’s (DHSC) Joint Committee on Vaccination and Immunisation (JCVI) and is a member of the World Health Organisation Strategic Group of Experts (SAGE); the views expressed in this manuscript do not necessarily reflect the views of JCVI, DHSC or SAGE. The other authors have no conflicts of interest.