Wash your hands kids!

Using a statistical model based on network theory, scientists at MIT's Department of Civil and Environmental Engineering have created a ranking of the top 40 U.S. airports in order of their ability to spread a disease that originated there. Leading the list: New York's JFK International, followed by Los Angeles, Honolulu, San Francisco, Newark, and Chicago's O'Hare and Washington's Dulles International Airport.

Great advice! Here's instructions on excellent bathroom etiquette:

How long is 20 seconds? Long enough to sing "Twinkle Twinkle Little Star" to yourself.

Note: Never, ever sing "Twinkle Twinkle Little Star" out loud in a men's room.

If you must sing, sing the "Now I Know My A-B-C's" song. It's essentially the same song anyway, and you'll seem like a badass while you're singing it.