And what about the airplane bathroom?

Airplane bathrooms are some of the worst. On a long flight, they may go a long time without cleaning; they’re also cramped, and the turbulence may lead to water or urine spray.

Sometimes you don’t even have to use an airplane bathroom to be exposed to the germs you would find in one. In one study, passengers sitting in the aisle seat may have been infected by an unwell passenger as they made their way down the aisle to