Bipolar and schizophrenia sufferers beware of the flu shot and any immunizations. CDC allows for flu shot exemption for those with neurological diseases however they have not reclassified schizophrenia as a neurological disorder. This despite so much scientific evidence to the contrary. I just prevented a bipolar friend from getting the flu shot because I noticed a relapse after he got the shot the last time. Vitamin D has been found to be many times more effective against the flu than a flu shot.