Dr Huachun Zou, epidemiologist by training, is a research academic at the School of Public Health and Community Medicine, the University of New South Wales, working on the Second Australian Study of Health and Relationships. He holds a bachelor’s degree in preventive medicine and a master’s degree in epidemiology and health statistics from China and a PhD in epidemiology and biostatistics from the University of Melbourne. His work focuses on the epidemiology and determinants of HIV and other sexually transmitted infections (STIs) among at-risk populations and interventions aimed at increasing the testing and diagnosis of HIV/STIs. Since 2005 he has been working on projects including sexual behaviours and HIV/syphilis infection among men who have sex with men (MSM) in China, condom use behaviours in female sex workers in China, policies in HIV control among injecting drug users and former commercial plasma donors in China, a liver cancer awareness campaign in the Chinese community in Victoria, human papilloma virus in teenage MSM in Australia and clinic-based interventions aimed at increasing HIV/STI testing among MSM in Australia. He also led a WHO-funded review project in 2013-2014 on viral hepatitis treatment in China.