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.


Putin says Ukraine opened 'Pandora's box' with strikes on economic targets
Canada to impose retaliatory tariffs across a raft of US sectors
Several dead after UK police car crash, police say
Ukrainian drones kill 6, hit warehouse of Russian online retailer Ozon
At least 13 Tunisians missing after migrant boat sinks off Tunisia, group says
