Professor Andrew Grulich MBBS, PhD is a medical epidemiologist and Public Health Physician. He is head of the HIV Epidemiology and Prevention Program at the Kirby Institute, UNSW, Sydney, Australia. He trained in Medicine in Adelaide, South Australia, and completed a Masters degree in Epidemiology at the London School of Hygiene and Tropical Medicine and a PhD in HIV-associated cancer at UNSW Australia. He is a past president of the Australasian Society for HIV Medicine, a past member of the International AIDS Society Governing Council, and a Fellow of the Australian Academy of Health and Medical Sciences. His research group studies the transmission and prevention of HIV and sexually transmitted infections in homosexual men, and the links between infection, immune function and cancer in people with HIV. He is co-Principal Investigator of the EPIC-NSW study of rapid scale up PrEP, and Principal Investigator of the Opposites Attract study of HIV treatment as prevention in gay men. He has contributed to over 350 peer-reviewed articles which have been cited more than 10,000 times.