That's why it's important to familiarize yourself now with some of the more common diseases you might encounter in such a situation and learn how to deal with them. After all, it's not like you'll be able to call an ambulance to bring you to the hospital in a collapse. Here's a helpful list inspired by Survival Dan 101.
You've probably heard a lot of news stories about E. coli outbreaks, which should be your first clue that the bacterial illness is extremely common and spreads easily. While it's pretty easy to avoid under normal circumstances through regular hand washing, nearly everything you touch could contain fecal matter in a disaster. The bacteria can get into your body through unclean utensils or raw produce, dairy products left out too long, food stored at improper temperatures, and raw seafood.