https://apnews.com/93924608c51944c64c05de736fafb168

WASHINGTON -- The director of the National Institutes of Health says federal guidance urging vaccinated people to wear masks indoors in communities of high COVID-19 spread is aimed at mostly protecting the unvaccinated and immunocompromised.

Dr. Francis Collins tells CNN’s “State of the Union” that mask mandates can help as virus infections spike higher in parts of the U.S. because studies show vaccinated people can spread the virus to others.