Neil Martinson heads the Perinatal HIV Research Unit (PHRU). He graduated as a physician from the University of the Witwatersrand, Johannesburg. He has over 20 years of managerial, and research experience in HIV and TB. His research work includes: preventing TB and measuring its interactions with HIV; viral drug resistance selected by PMTCT programs; case finding for TB in HIV-infected pregnant women and household contacts of a TB case. He has undertaken four large studies of household contact tracing, using index cases of a variety of different types who either had TB disease or TB infection. He has published several studies assessing the value of active case finding using different methods of diagnosis. He has experience in design and implementation of both individually and cluster randomised trials and while he continues to conduct research in Soweto, he has also built a large research platform in Matlosana and Limpopo Province, both areas with and HIV/TB problem in South Africa. His current research thrust is measuring reductions in mortality, morbidity and transmission of TB.