Christos Karatzios is an Assistant Professor in the Department of Pediatrics and in the Division of Infectious Diseases at the Montreal Children’s Hospital (McGill University Health Centre) since 2004. He also is an Associate Member in the Département de Pédiatrie, Division d’Immunologie, Clinique d’Immunologie Spéciale, at the Centre Hospitalier Universitaire (CHU) - Mère Enfant de Ste Justine since 2004. He is a McGill Medicine graduate and received his Pediatric and Infectious Diseases training at the Montreal Children’s Hospital. He has also completed clinical research training in pediatric HIV at the University of Miami, Leonard M. Miller School of Medicine. Additionally, he is a professor at McGill University and is the course coordinator of the Infectious Diseases Block of the McGill undergraduate medical curriculum. In 2014 he was awarded the Osler Teaching Award for the most effective teacher by the McGill Medicine graduating class. As a member of the Canadian Pediatric AIDS Research Group, he is involved with perinatal HIV surveillance across Canada. As of 2020 he has worked with the Brighton Collaboration – a WHO and USFDA-partnered group looking at COVID-19 complications in children and as part of this group has published an oft-cited diagnostic guide to recognize post-COVID-19 (and possible post COVID-19 vaccine) Multisystem Inflammatory Syndrome in Children/Adults.