Masks are no longer mandatory on public transit, but they can still help reduce COVID’s spread. Choose wisely.

Americans could scarcely be blamed for feeling confused about whether or not to wear a mask right now. A week ago, the Centers for Disease Control and Prevention extended into May a nationwide mask mandate for travel on airplanes, trains, buses and other forms of public transportation. Then on Monday, a federal judge in Florida struck it down. Meanwhile, some local governments and private employers are reasserting mask mandates in response to rising COVID-19 transmission rates because of virus variants.