helse Ny forskning: Korona-immunitet kan vare i årevis closeup of a male healthcare worker, wearing blue surgical gloves, placing the sample into the covid-19 antigen diagnostic test device, on a blue table Illustrasjonsfoto: Colourbox Johanne Wainø Topsøe-Jensen, ing.dk 31.05.2021 - 15:00 covid-19 koronavirus helse korona