A cheerleader who took the seasonal flu vaccine had a rare reaction triggering a neurological disorder, Dystonia.

Dystonia is a neurological movement disorder in which sustained muscle contractions cause twisting and repetitive movements or abnormal postures.[1] The disorder may be inherited or caused by other factors such as birth-related or other physical trauma, infection, poisoning (e.g. lead poisoning) or reaction to drugs, particularly neuroleptics.[1]