OK, here's some things to know about getting the flu shot:
-First off, get it. People who tell you otherwise are just stupid and/or misinformed. Its usually free if you go to the right place.
-The flu shot WILL NOT give you the flu. They use an attenuated or dead virus in order to prime your body against the flu. Basically, you're giving your body a weakened or dead version in order to trick it into making antibodies ahead of time so that in the event it actually encounters the real strain, it's already primed and ready to fight it.
-The creation of these antibodies will most likely make you feel ill for a short time. You'll probably feel like you've got a cold. Quit being a pussy and deal with it. It's waaay better than if you get the actual flu.
-They (whoever studies this shit) only create a vaccine every year for the top 3-4 most prevalent strains that they BELIEVE will be around. i.e. You're protected from most of the strains, but not all.
-You COULD still get the flu, though your chances are much much less. The vaccine doesn't prevent getting it; it just reduces your chances.
-The flu is a respiratory virus. If your tummy hurts, you don't have the flu. If you don't have a temp, you probably don't have the flu.
-If you choose not to, you'll probably be ok, but why take the chance?
Just because you think you're young and healthy doesn't mean getting the flu couldn't put you on your ass. Remember, the flu kills thousands of people every year. Ending up on a ventilator in a Roto-Prone bed, with a tube shoved up your nose and another in your dick, and a hose shoved in your ass, because you skipped out on the vaccine and are now in ARDS does not sound like a good time to me.