On 17th January the OUCRU Unit in Hanoi were delighted to welcome Mattias Larsson as the latest member of the team. Mattias was trained in medicine at Uppsala University and defended his PhD thesis ‘Antibiotic use and resistance: Assessing and improving utilization and provision of antibiotics and other drugs in Vietnam’ in 2003 at the Karolinska Institute. Mattias has worked as a physician at the infectious disease department of Karolinska University Hospital, with a special focus on HIV medicine. He has been working in Vietnam since 1997, initially with an EU funded project “Towards Good Pharmacy Practice in Thailand and Vietnam” as well as SIDA funded antibiotic resistance studies. From 2002 to 2006 Mattias was joint national coordinator for the INCO-DC EU funded project ‘Towards controlling antimicrobial use and resistance in low-income countries - an intervention study in Latin America’ implemented in Peru, Bolivia and Italy. He has developed and taught on global health courses in India, Tanzania, Cuba and Vietnam. His present research includes a randomized controlled trial to assess the effect of peer support on virological treatment failure rates among 640 HIV patients in Quang Ninh Province, and community based antibiotic use and resistance studies. Mattias joins OUCRU as Senior Clinical Scientist and will lead the clinical aspects of the research and training program of OUCRU Hanoi.