I'm not sick. Should I have to wear a face mask? Yes. COVID-19 can be spread by people with no symptoms, who don't even know they're sick. And as many as 35% of COVID-19 cases are asymptomatic.

If you've ever flown, you've likely heard the pre-flight routine from flight attendants where they instruct you to place your own oxygen mask before assisting another person. Most passengers don ...