I'd say take zinc anyway. In my experience, vitamin C and garlic are good preventatives of colds, so take lots if you know you're going to be around someone who's sick, but zinc is effective even after you're under the full effects. Like Manwich said though, you can only take it for a few days in a row or you get too much in your system. It depends on your body size, but once a day for 2-3 days in a row is perfectly safe.
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