Pizza: a traveler’s best friend.
If you and your friends are planning on a trip, say, two days from now, never ever eat foods that you’re unsure of (or those that require a lot of handwork, like gourmets, maybe?). You might get diarrhea and not be able to board the plane two days from now.
What you can do is make a little sacrifice. You like pizza? You can settle with that for the mean time. Aide from the delicious toppings of mozzarella, pepperoni and mushrooms, its ingredients don’t spoil that fast. Plus, before a pizza is served on your tabletop, it has been baked in a high temperature oven that most probably killed all the bacteria.
Photo taken from http://thehappypill.files.wordpress.com