To mask or not to mask: which places still require face coverings in the US?

After a judge struck down the mandate on transportation what anti-Covid mask rules apply in places from hospitals to theaters?

Most US airlines and airports, the ride-sharing company Uber and national train service Amtrak are now lifting Covid-related mask mandates that have been in place for more than a year.

The shift comes after a judge in Florida ruled against a federal mandate and the Biden administration said it would not enforce one even as Covid-19 infections are rising again in the US, and more than 400 people are dying every day from the airborne disease.