Ethics approval and consent to participate {24}
LSHTM Research Ethics Committee 28252, WHO Ethics Review Committee 2021-KEP-588, National Health Research Ethics Committee of Nigeria NHREC/01/01/2007, National Bioethics Committee Pakistan NBC-950, and National Institute for Medical Research Tanzania NIMR/4266. Approvals from other relevant national and local RECs in each participating country will be obtained as appropriate. Written, informed consent to participate will be obtained from all participants.