Call your vaccination provider or your healthcare provider if you have any side effects that bother you or do not go away. If you experience a severe allergic reaction, call 9-1-1, or go to the nearest hospital. Signs of a severe allergic reaction can include: For example, if 1 million doses of a vaccine are given, 1 to 2 people may have a severe allergic reaction.

Serious side effects from vaccines are extremely rare. Learn more about how vaccines provide immunity. Keep in mind that most common side effects are a sign that your body is starting to build immunity (protection) against a disease.

Pain, swelling, or redness where the shot was givenįainting can also happen after any medical procedure, including vaccinations.

The most common side effects after vaccination are mild. What are common side effects of vaccines? The most common side effects-like soreness where the shot was given-are usually mild and go away quickly on their own. Most people don’t have any serious side effects from vaccines.

I have an effect on you