The cities of San Francisco and New Orleans on Aug. 12 ordered patrons to show proof of Covid-19 vaccinations to enter restaurants, gyms and other venues, joining New York in a severe step designed to contain the fast-spreading Delta variant.

The United States set a one-day record with over 1 million coronavirus diagnostic tests being performed, but the country needs 6 million to 10 million a day to bring outbreaks under control, according to various experts.

The U.S. coronavirus outbreak crossed a grim milestone of over 3 million confirmed cases as more states reported record numbers of new infections, and Florida faced an impending shortage of intensive care unit hospital beds.

Americans were back on the road after more than two months of coronavirus lockdowns that kept them homebound, with beach-area traffic tripling since the low point in mid-April.