What should I do if I or my child have an unexpected or serious reaction to a vaccine?
- Contact the health care provider who gave the vaccine to report the reaction.
- Contact your local health unit if you don't know who gave the vaccine. Ask to speak with a nurse.
- If it is an emergency, call 9-1-1.
It is important to report any unexpected or serious reactions (called adverse events) to your health care provider so that they can be investigated further. It is important to report the adverse event even if you don’t know if it was caused by the vaccine. By reporting adverse events, possible vaccine safety concerns can be investigated and appropriate actions are taken.
Serious reactions to vaccines are very rare.
Date last reviewed:
Monday, Jan 31, 2022