Should vaccinated people wear masks indoors? Infectious disease physician weighs in

With the highly infectious delta coronavirus variant spreading at an alarming rate, the World Health Organization in late June 2021 urged people to again wear masks indoors—even those who are fully vaccinated. And on July 15, Los Angeles County, California, announced that it would again require masking up in public indoor spaces, regardless of vaccination status. This was followed by a recommendation—though not a mandate—from seven Bay Area counties for all to again don masks in public indoor settings.

source https://medicalxpress.com/news/2021-07-vaccinated-people-masks-indoors-infectious.html