Loading...
It has become evident that some individuals may develop COVID-19 despite full vaccination, especially if they are older or immunocompromised and if longer intervals have elapsed since the second dose. Even though COVID-19 is then generally mild (or asymptomatic), transmission of the virus may occur — and the infectiousness of dually vaccinated individuals with COVID-19 remains unclear. Now, a population-based study in Cologne, Germany, provides some answers. Between December 27, 2020 (the date of the first vaccination in Cologne), and August 6, 2021, COVID-19 cases occurred in 357 and 27,457 fully vaccinated and unvaccinated residents, respectively. Each COVID-19–positive individual in the vaccinated group (VG) was matched 1:1 by age, sex, …