Regina Sommer is Professor at the Medical University Vienna, Austria, at the Institute for Hygiene and Applied Immunology. She is head of the unit Water Hygiene, where she is teaching, researching and running the accredited Laboratory and Inspection Body "Hygiene Vienna" (authorized by the Ministry of Health) at the Medical University. She serves as co-head of the Interuniversity Cooperation Centre (ICC) Water & Health (www.waterandhealth.at). Regina is convenor of the Austrian drinking water commission, member of the Advisory Board for Bathing Water Hygiene of the Austrian Ministry of Health and member of the European Microbiology Expert Group (EMEG), an advisory board for the European Commission. Since 2019 she is chair of the IWA Specialist Group Health Related Water Microbiology. Her scientific fields and expertise cover water quality and health, water disinfection technologies and infection control as well as water quality in health care facilities and water for medical applications. Regina has established the "UV Team Austria" running the Water Test Centre Wiental with a Test Facility for the measurement of the microbicidal efficacy of UV disinfection systems (www.uv-team-austria.at). Regina Sommer has studied Food- and Biotechnology at the University of Natural Resources and Applied Life Sciences, Vienna, and did her PhD at the Medical University Vienna. In 1999 she received the Venia docendi and was appointed as Professor in 2000.