Last year my wife had an adverse reaction to the flu shot, although she had it in previous years with no reaction. She has a sensitive immune system and arthritis, and something in the shot caused inflammation in her hips and back, causing intense pain. It took about six weeks for her to get back to normal. We studied ways to reduce inflammation and found some foods that helped. Her doctor has signed a form so that she is no longer forced to get the flu shot as a condition of employment. I will get the flu shot this year, but for my wife, she is done with the flu shot.