Several studies recently published seem to show a correlation — not causation — between blood type and risk of contracting COVID-19 or experiencing more severe symptoms. The studies are interesting, but researchers warn that much further research is needed. Mypinder Sekhon, an intensive care physician at Vancouver General Hospital and an author of one of the studies, said, “As a clinician … [blood type] is at the back of my mind when I look at patients and stratify them. But in terms of a definitive marker we need repeated findings across many jurisdictions that show the same thing.” Sekhon added that he doesn’t believe blood type “supersedes other risk factors of severity” for Covid-19, such as a person’s age or comorbidities. “If one is blood group A, you don’t need to start panicking, and if you’re blood group O, you’re not free to go to the pubs and bars.”