Here is the truth about flu shots.
http://www.cnn.com/2007/HEALTH/10/31...hot/index.html
Honestly, it's a bunch of bunk and my experience has been that the people who get the flu shot end up sick every time. My mom and dad used to get one every year while I would not and they would always end up getting sick. There are so many different strains of flu and the shot "supposedly" guards against 3, that's it. I think all it actually does is taxes your immune system for no reason thus making it easier for a different strain or some other virus to make you sick. Don't believe the crap about a flu shot preventing the flu, it does not work!