one traveler shared. “Of course you can ask a sick person to wear a mask. They are not obligated to do so, but asking them to do the right thing is not improper IMO,” another wrote.

Even medical experts agree this may be the best path. "It's reasonable to ask a person who appears to be sick to put on a mask—plain old decency," Raymond Gadd, a general practitioner at Hola ...

A sick woman with nausea on an airplane.