Funding for this research was provided by:
U.S. Navy (D1430)
Bill and Melinda Gates Foundation (OPP1193472_2018)
Wellcome Trust (106698/Z/14/Z)
Received: 23 April 2021
Accepted: 7 September 2021
First Online: 17 September 2021
: This study was approved by the Viet Nam Ministry of Health Ethics Committee and reviewed by the U.S. Department of the Navy Human Research Protection Program in compliance with all applicable federal regulations governing the protection of human subjects (HRPO.NMRCA.2018.0004 and HRPO.NMRCA.2018.0010). All participants provided written, informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.