Ethics approval and consent to participate
The study which generated the data used for this analysis was approved by the London School of Hygiene and Tropical Medicine Ethics Committee (reference number: 15801), the WHO Ethical Review Committee (reference number ERC 0003065) and the Medical Research Council of Zimbabwe (reference MRCZ/A/2323). Headman unit leaders gave verbal consent for participation in the community-led arm. Survey participants gave written informed consent. Parental consent was waived for 16–17-year-olds as, according to the Zimbabwe Ministry of Health, they are able to make their own decisions about HIV testing. Ethics approval for this data analysis has been obtained from the London School of Hygiene and Tropical Medicine Research Ethics Committee (reference number: 25852).