Dr Hsu is an infectious diseases physician who has spent the past decade researching and treating patients suffering from antibiotic-resistant bacterial and invasive fungal infections. He is Vice Dean of global health and programme leader of infectious diseases at the National University of Singapore’s Saw Swee Hock School of Public Health, where in 2012 he helped found its Centre for Infectious Disease Epidemiology and Research. He also works with Singapore’s Ministry of Health (MOH), where he has served on several committees, co-chairing a workgroup that led in 2017 to the launch of the national strategic action plan on antimicrobial resistance. He was previously clinical director of the National Centre for Infectious Diseases and director of the Singapore Infectious Diseases Initiative. He has also served as a technical advisor on surveillance of antimicrobial resistance to the World Health Organization’s Western Pacific regional office.