I travel a fair amount and take a little of this and a little of that and still get sick sometimes. Just this past week, I got the sniffles after coming back from ATL. I take a multi, C, and E. When I travel I add zinc as well. Well after I got back, the sniffles turned into bronchitis which had me in the ER twice in three days! Now I am getting neevous about my 2 week trip to Japan in a couple of months