The COMMUNITY cohort comprises 2,149 employees at Danderyd Hospital Photograph: Danderyd Hospital Only weeks after the coronavirus reached Sweden, blood samples were taken from more than 2,000 employees at Danderyd Hospital. Today, a selection of the country’s leading researchers collaborate with this unique material within the COMMUNITY study to extract new knowledge needed to fight covid-19. How long are we protected by antibodies after a covid-19 infection? And what will immunity look like over time? In a current collaboration, leading research environments at three Swedish universities ...