Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPPGD759)
Received: 28 August 2020
Accepted: 9 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: All households provided written informed consent at enrollment. The protocol was reviewed and approved by human subjects review committees at the icddr,b, at the University of California, Berkeley and at the Stanford University.
: All co-authors have reviewed this version of the manuscript and provided consent for manuscript submission.
: We declare no competing interests.