Catherine Kegakilwe Koofhethile (Khei), originally from Botswana, is currently a Post-doctoral fellow at Harvard School of Public health in Professor Max Essex’s Laboratory under the mentorship of Dr Vladmir Novitsky, Boston, USA. She also holds a Research Associate position at the Botswana Harvard Partnership (BHP) in Botswana where she supervises and mentors a number of SANTHE graduate students. Her current research focuses on understanding the architecture; size and structure of the reservoir in HIV infected individuals undertaking antiretroviral treatment in Botswana. She uses a combination of Immunological and Virological assays to monitor proviral reservoir in these individuals. She has previously completed her PhD in Immunology at the University of KwaZulu-Natal in Durban, South Africa.