The info about the virus thats in the shot is true, it is no longer used with a live virus. BUT...if you already have flu like symptoms, you might have a bad reaction to the flu shot when you get it...
ALso there are so many strains of the flu virus around...Just be glad that its not the avian flu...The flu shot cant possibly protect against all flu viruses. Also, it is a virus, so you never really get rid of it if you have it because it is a virus.
All that being said, I have never had a flu shot that I know about. I used to always see people that would get sick afterwards. My boss has told me different. I now have worked with the health department on the county pandemic flu plan and I have learned a lot...But Im still NOT getting a flu shot...