Donald Trump appears to have done a U-turn and has urged Americans to wear masks, after what he called a "concerning" rise in coronavirus cases in the country's southern sunbelt.
The US president says many of those getting sick are under 35, even though the average age of those dying is 78.
America's had more Covid-19 cases than any other country, with more than 3-and-a-half million recorded.
At a White House briefing, Mr Trump's admitted there may be worse to come.
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