I had a flu shot last Thursday for the 2nd time ever. My new job (working for a hospital) requires it. By Sunday night I came down with something and just today I'm finally starting to feel better. My wife has not had any signs of catching what I have (and she thinks it's ebola). I'm not ready to pin this one on the shot, but I can see why people would think that. Mine was just a minor annoyance though, there's no way this is the flu.