Some children experience mild reactions to vaccines. They might have a sore arm and/or a fever that goes away in few days. It is recommended to treat the pain and fever, if they develop, using acetaminophen (Tylenol, Tempra) or ibuprofen (Advil, Motrin). Young children should not be given ASA (acetylsalicylic acid, Aspirin) as it can increase their risk of Reye’s syndrome. This syndrome can cause liver and brain damage.
In extremely rare cases, a vaccine might cause a serious allergic reaction called anaphylaxis, which includes swelling of the lips, tongue, or throat; hives; and difficulty breathing. If this reaction occurs, call 911 or seek medical attention right away.
If there are any questions or concerns about the side effects after a vaccination, contact a local public health office, physician, nurse practitioner, or call Healthline 811.
Vaccines are one of the safest and most successful medical interventions, leading to the elimination and control of many infectious diseases that might have otherwise caused serious and life-threatening illnesses and deaths. To learn more about vaccines in Canada, visit Immunize Canada.