Editorial: The US needs an airplane mask mandate

In a country where COVID-19 remains out of control, it’s wrong for anyone not to wear a mask on a commercial airplane. Increasing evidence shows that good cloth face coverings significantly lower the spread of the novel coronavirus at close quarters — and that not wearing them is risky, because this germ is so often breathed into the air by people who don’t yet know they have it. One passenger on a flight from Singapore to Hangzhou, China, was infected by neighboring passengers when he merely let his mask slip below his nose while talking with his family.