New research presented at this year’s European Congress on Obesity (held online, 10–13 May) reveals an association between increasing body mass index (BMI) and the risk of testing positive SARS-CoV-2, the virus which causes COVID-19. The study is by Dr. Hadar Milloh-Raz, The Chaim Sheba Medical Center, Tel-HaShomer, Ramat-Gan, Israel, and colleagues.