Quoting Alyssa's Mama *:" This is the first year, that I said okay for giving the flu shot. But, doesn't the flu shot prevent ... [snip!] ... the flu ? lol I am a tad bit confused...if the flu shot is preventing it & she got it, then what the smurf was the point ?"
the flu shot doesn't protect against ALL STRAINS of the flu. just the more common ones. the vaccine changes year to year to vaccine against the top strains from the past few years.
you could get the shot, and then get a totally different strain of the flu.
also, the shot doesn't prevent you from getting the flu. it just exposes your body to the virus, to strengthen your immune system. making it more likely if you START getting the flu, your body will have antibodies already programmed to fight that strain. but of course, if you get a different strain, then you will still get sick.
ETA: i agree with the other girls. a fever of 101 doesn't mean she has the flu. she could have something else. a different virus, or even just a cold...