US President Donald Trump has refused to tell Americans to wear masks to contain the spread of Covid-19.
Earlier, Dr Anthony Fauci, the country's top infectious disease expert, urged local and state authorities to encourage people to wear masks.
The wearing of face coverings has become a political issue in the US.
A number of US states, mainly in the South, are experiencing a surge in confirmed cases of coronavirus.
Meanwhile children in many US states have been told they won't be going back to school for the new academic year.
Seven dead, 82 missing in Indonesian landslide
Bombing at Pakistan wedding kills 7, police say
Australian boy dies after shark attack in Sydney Harbour
One dead as Ukraine's two largest cities under Russian attack
US withdraws from World Health Organisation
