What food should people that are sick eat? What food should they stay away from?

Is there any food that boosts your immune system?What food should people that are sick eat? What food should they stay away from?
Definetly stay away from dairy. Unless you have diahrea then yogurt helps. Juice can also make it worse too. Drink Gatorade, powerade, pedialyte or the adult version. Eat soups, Chicken is supposed to help because of the inzymes or whatever in it., Vegatables and fruit. Orange juice is great with colds and tomatoes are good to eat for sicknesses too.
Plums are good. also try vitamin c fruits like oranges. maybe have warm soups as well.
jello is good i suppose
Fruits! Citrus and Berries (especially blueberries) give your immune system a little kick. But if you're sick, stay away from dairy because it makes you produce more phlegm. Not good.
Chicken soup actually helps. If you have the flu or a fever stay away from milk. Really nasty if you have to puke. Drink a lot of water. That helps your body fight the illness.
They should have toast its soothing and filling to stomachs. Sick people tend to find the texture nice too. They should avoid dairy products because dairy agitates the stomach.
LIKE DIFFRENET ILLNESS HAVE DIFFRENT CURE SAME LIKE THAT DIFFRENT ILLNESS DIFFRENT PRECAUTIONS AND OPTIONS TOO SO FIRST PLZZ SPECIFIY NAME OF DISEASES