I don't know what exactly you got, just I know whenever I'm sick, and need to like, "do stuff" I take this Chinese herb called Astragalus, it works wonders. Could maybe try ginseng, too. Also, while vitamin C is needed to fight infection, B vitamins are needed too. A B vitamin supplement really helped me in general, but I'm sure it could do something for sickness. But try to find some astragalus, it's awesome stuff. My Asian market sells it in little vials for like $3 for 10 or 12 vials.