Take your health into your own hands:
Malloy says that you can avoid many illnesses if you do two things: get an annual flu shot, and wash your hands properly and frequently. “Use warm water, any kind of soap—it doesn’t have to be anti-bacterial—and rub your hands together from the wrists down to fingertips and in between the fingers as well,” she says. To ensure that you’ve cleaned sufficiently, Malloy recommends singing Happy Birthday in your head once or twice. Can’t find a bathroom? Alcohol-based sanitizers are the next best option to hand washing.