"It's reasonable to ask a person who appears to be sick to put on a mask—plain old ... and could switch you or tell the person to mask up," he said. "Just don't expect them to remove someone ...

“Went to Vegas in early Feb. Guy behind me was practically hacking up a lung the whole flight ... “Of course you can ask a sick person to wear a mask. They are not obligated to do so, but ...

Surgical masks can be helpful if you are sick, as they prevent the wearer's germs from spreading to other people. If you're a health care worker, and want to protect yourself from acquiring an ...

A sick woman with nausea on an airplane.