Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP117653)
Medical Research Council
Received: 20 June 2019
Accepted: 28 March 2020
First Online: 6 May 2020
Change Date: 28 July 2020
Change Type: Update
Change Details: The original version of this Article was updated shortly after publication following an error that resulted in the ORCID ID of Robert S. Heyderman being omitted.
: N.B-Z. reports investigator-initiated research grants from GlaxoSmithKline Biologicals and from Takeda Pharmaceuticals outside the submitted work. No other authors declare competing interests.
: The study protocol was approved by the College of Medicine Research and Ethics Committee, University of Malawi (P.02/15/1677) and the Liverpool School of Tropical Medicine Research Ethics Committee (14.056).