@maiyannah While I agree on pseudoscience bullcrap that a !vegan diet will magically cure ailness, the fact is that you'll have a smaller risk of contagious disease if you avoid animal products:
1. because of how the industry works, chickens crowding in small areas with their own feces, others' corpses etc. etc. (pick any animal that gets industrially bred and it'll have similar bad circumstances except some of the "ecological meat" products)
2. nasty bacteria that grows a whole lot better in meat than on greens
3. overuse of antibiotics just about everywhere, which in turn gets to you because if they can't kill the germs already in the animal they won't be able to kill it when you've consumed it.

etc. etc.