It’s pretty much a given at this point that no one enjoys air travel. The indignity of the security line. The battle for an overhead bin. The anxiety of recognizing you’re in a middle seat, and the agony of wondering whether that wailing toddler headed down the aisle is going to end up next to you.

To that long list of stressors, add another: You might catch measles. And you don’t even have to enter the tight quarters of an airplane cabin to be vulnerable. For the second time in two years, the Centers for Disease Control and Prevention has confirmed that someone caught the measles by walking past an infected person in an airport.

Last week, in its bulletin the Morbidity and Mortality Weekly Report (really, it’s called that;