AdvertisementMore Than 20 U.S. States Now Require Face Masks In PublicJuly 10, 2020Bill ChappellfacebookEmailPatrons wear masks as they sit on the outdoor patio of a restaurant on Pier 39 at Fisherman's Wharf in San Francisco. California is among more than 20 states that require face masks to help combat the spread of the coronavirus. (Bloomberg via Getty Images)