Andrew Grulich is a medical epidemiologist and specialist public health physician with 30 years of experience in conducting HIV research and working for implementation of the results. He is Theme Director, Populations and Prevention, and Head of the HIV Epidemiology and Prevention Program, at the Kirby Institute, University of New South Wales, Sydney, Australia. He leads research on the prevention of HIV and STIs in gay, bisexual and other men who have sex with men. Andrew was the principal investigator of the Opposites Attract study, a cornerstone of the Undetectable=Untransmissible campaign, and led the EPIC-NSW study of population-based PrEP roll out, which demonstrated dramatic reductions in HIV incidence. His other major research theme is on the link between infection, immune function and cancer, with a recent focus mostly on the prevention of human papillomavirus-associated anal cancer. He has contributed to more than 430 peer-reviewed publications, which have been cited more than 20,000 times.