I always refused getting the flu shot. After my friend Greg died of the flu I changed my mind and I decided to get the shot. I just got this years shot a few days ago and just like last year besides the pain at the injection shot I got a cough that seemed to start while I was sleeping. After waking up I discover that I have this strange dry cough that is more uncomfortable than anything else, but last year it hung around for well over a month. I mentioned this to the doctor who mentioned that this rears vaccine is a different formula than last years. Is that a type of invalidation of my suggestion that there might be a connection between the shot and the cough?