Funding for this research was provided by:
Wellcome Trust (206194, 098051, 090770/Z/09/Z)
Medical Research Council (G0600718)
Department for International Development, UK Government (MR/M005212/1)
Division of Intramural Research, National Institute of Allergy and Infectious Diseases
Bill and Melinda Gates Foundation (OPP1118166)
Received: 14 January 2020
Accepted: 29 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: All participants or guardians provided written consent and samples were collected under approval from the Cambodian National Ethics Committee for Health Research and the National Institute of Allergy and Infectious Diseases Institutional Review board.
: Not applicable.
: The authors declare that they have no competing interests.