what are the signs and symptoms of tetanus?
['Jaw cramping.', 'Sudden, involuntary muscle tightening (muscle spasms) – often in the stomach.', 'Painful muscle stiffness all over the body.', 'Trouble swallowing.', 'Jerking or staring (seizures)', 'Headache.', 'Fever and sweating.', 'Changes in blood pressure and fast heart rate.']