What are the side effects of vaccines?
Most people don’t have any serious side effects from vaccines. The most common side effects, like soreness where the shot was given, are usually mild and go away quickly on their own.
The most common side effects after vaccination are mild. They include:
- Pain, swelling, or redness where the shot was given
- Mild fever
- Feeling tired
- Muscle and joint aches
Most common side effects are a sign that your body is starting to build immunity (protection) against a disease.
Serious side effects from vaccines are extremely rare. For example, if 1 million doses of a vaccine are given, 1 to 2 people may have a severe allergic reaction.
Keep in mind that getting vaccinated is much safer than getting the diseases vaccines prevent.