Here’s Why Vaccinated People Still Need to Wear a Mask
The new vaccines will probably prevent you from getting sick with Covid. No one knows yet whether they will keep you from spreading the virus to others — but that information is coming.
Scientists worry that if vaccinated people are silent spreaders of the virus, they may keep it circulating in their communities, putting unvaccinated people at risk. Photo: Max Whittaker for The New York Times
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