Diphtheria affects the throat and nose, making it hard to breathe.
Severe cases can cause nerve problems, inflammation of the heart muscle, and even death.
Tetanus, or Lockjaw , causes painful muscle spasms. It kills almost half of its victims. Whooping Cough, or Pertussis , causes dangerous coughing spells that make it very hard to breathe. It can cause pneumonia, convulsions or brain swelling. Haemophilus influenzae, or Hib , causes brain swelling that can result in permanent damage or death.