My husband, previously perfectly healthy, rarely went to the doctor, suddenly developed cervical dystonia, torticollis and shoulder pain following a flu injection last winter. the shoulder pain was in the same arm of the injection site. His neurologist told us that he believed the flu shot had caused this condition because it developed so suddenly. He is taking Botox shots which has provided some relief but seems to get worse again the closer he gets to the time for another shot. In your opinion, could the flu shot have caused this, either from the injection itself of the way it was administered?