US health officials tell people to wear face masks as infections soar past a quarter of a million.
The US Centers for Disease Control and Prevention is recommending Americans wear masks in public to protect against the coronavirus.
But President Donald Trump says wearing masks is voluntary, and that he has chosen not to follow that advice.
The United States is now the global epicentre of the pandemic, with more than 277,000 confirmed cases.
Al Jazeera’s Shihab Rattansi reports from Washington, DC.