I would definitely keep the protein, especially if it is a whey. whey contains immunoglobulins which can help boost immunity.i actually dont really see a reason to stop taking these supps unless you're very sick, vomitting, etc. and then would msot likely jsut stop the erase or daa. you could adding try echinacea, goldenseal, elderberry, colloidal silver, colostrum, etc. to help boost your immunity as well.