How come some people est junk food and not touch fruit in months but don't get sick?

I have a friend he eats doritos and pepsi as a snack every 2 days or so Doesent touch regular food neither does he drink water How is his immune system so good He's been sick 2 times last year While everyone else is sniffeling

Submitted March 07, 2019 at 06:09AM by DeruloDude1987 https://ift.tt/2EFIWtx