I am a Public Health Epidemiologist and a Wellcome Programme & NIHR International Intermediate Fellow based at Malawi Liverpool Wellcome Programme Clinical Research Programme. My interests are in statistical methods and the design and conduct of public health trials. I, along with Prof Liz Corbett are the pioneers of population-based HIV self-testing in Malawi. Our HIV self-testing studies have contributed to policy change in Malawi which now includes HIV self-testing in the national guidelines in July 2018.