Funding for this research was provided by:
Wellcome Trust (WT105882MA)
Received: 28 September 2018
Accepted: 26 April 2019
First Online: 17 May 2019
Change Date: 18 July 2019
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via a link at the top of the paper.
: A.J.P. has previously conducted clinical trials of vaccines on behalf of Oxford University funded by GlaxoSmithKline Biologicals SA and ReiThera SRL but does not receive any personal payments from them. A.J.P. is the chair of the UK Department of Health (DH)’s Joint Committee on Vaccination and Immunisation (JCVI), but the views expressed in this manuscript do not necessarily represent the views of the JCVI or the DH. The remaining authors declare no competing interests.