Pertussis is caused by bacteria. It can cause spells of violent coughing and choking, making it hard to breathe, drink, or eat. The cough can last for weeks. Pertussis is most serious for babies, who can get pneumonia, have seizures, become brain damaged, or even die. About half of the babies who get pertussis have to go to the hospital.
Symptoms can include sudden fever, sore throat, headache, muscle weakness, and pain.
Polio can cause paralysis and death. The measles virus is spread very easily. Even being in the same room with a person with measles is enough to catch the disease. Symptoms include a rash, fever, cough, and watery eyes. Measles can also cause pneumonia, brain damage, seizures, or death.