The World Health Organization (WHO) is tightening its mask guidelines, telling people who live in areas where the coronavirus is still spreading to wear masks at all times in a variety of public places.
The new guidelines, rolled out on Tuesday, specify that those entering stores, workplaces and schools with low ventilation should make sure that they are wearing a mask.
The WHO is also asking that people wear masks if they cannot keep a physical distance of at least three feet from others within an enclosed area.