Vaccination reduces risk of long Covid, even when people are infected, U.K. study indicates

People who are fully vaccinated against Covid-19 appear to have a much lower likelihood of developing long Covid than unvaccinated people even when they contract the coronavirus, a study published Wednesday indicated.

The research is among the earliest evidence that immunization substantially decreases the risk of long Covid even when a breakthrough infection occurs. Already, researchers had said that by preventing many infections entirely, vaccines would reduce the number of cases of long Covid, but it wasn’t clear what the risk would be for people who still got infected after vaccination.