[mepstein]

When you get a flu shot you can still get the flu but since your body has built up antibodies to the flu because of the shot, it will usually be much less severe. We saw that at the school where I work. Kids would come in complaining of a sore throat, joint pain, etc but not feel really sick and maybe have a light fever, maybe not. They would test positive for the flu but never get really sick, in bed, want to die. That's because the flu vaccine help build up their flu immunity. It did its job. In older people and the youngest, that's often the difference between surviving the flu or dying of it or one of it's complications.