A vaccine reaction is any injury or condition that occurs as a result of a vaccination that has been given to protect against disease. Serious reactions to vaccines are very rare, and vaccination is far less risky than the catching the disease it prevents.

NORMAL REACTION TO DTaP IMMUNIZATION

• Mild fever
• Irritability
• Localized tenderness and swelling at site of injection

• Unrelieved crying
• High-pitched cry
• Unusual shock-like syndrome
  • Unresponsiveness
  • Hypotonia (limp/decreased tone)
• Marked increase in sleeping time
• Persistent high fever (104 degrees Fahrenheit or greater)
• Seizure or convulsion

NORMAL REACTION TO MMR

• Fever up to 103 degrees about 7-10 days after vaccine administration
• Mild measles rash (reaction to measles vaccine)
• Transient joint pains (reaction to rubella vaccine)

Note: Several groups have said that the rise of autism in the United States is due to MMR vaccinations. However, very detailed scientific study has shown this to be untrue.

ABNORMAL REACTION TO POLIO VACCINE

• Anaphylaxis or anaphylactic shock

NORMAL REACTION TO PREVNAR (PNEUMOCOCCAL VACCINE)

• Fever

Testing is usually unnecessary.