TweetWell, a flu shot is nothing more than a weak form of the flu, so I don't see why there would be a direct prob. Other than the fact you could get flu symptoms for a couple days and have deminished recovery times, it shouldn't have any direct negative effect on the gear itself. I personally have neve gotten a flu shot, I think it's over rated, IMO. If I feel a little under the weather, I take a bunch of immune boosters and I usually get over it before it ever starts.