@Bry Heehee! @EverybodyElse: http://www.jonathancoulton.com/wiki/Bacteria
Getting back to the topic at hand, something a speech therapist suggested was to swab the inside of your nose with Polysporin. Not only does it kill the nasty buggies, but it also keeps the inside of your nose moist, preventing abrasions that might let the buggies into your system. Especially important in circulated air environments, like planes.