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.


Two suspects in Louvre jewel heist case arrested in Paris
Russian attack on Kyiv kills three, injures 31
PKK announces withdrawal from Turkey
Israeli military says it conducted 'targeted strike' in central Gaza
Trump oversees Thailand-Cambodia ceasefire agreement
