Oxford study finds the vaccinated less likely to spread Covid

Full vaccination against Covid-19 could still protect people around the vaccinated individual even if a breakthrough infection with the Delta variant occurs, but there are signs of that protection waning after several months.

The finding may alleviate some concern raised in earlier studies that suggested that vaccinated people could be as contagious as unvaccinated people.

According to an analysis of contact tracing data in England, people fully vaccinated with the Pfizer vaccine are...