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
  • Chills
  • Feeling tired
  • Headache
  • 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.

What if I feel sick after getting vaccinated?
Talk with your doctor if you’re concerned about your health after getting vaccinated.
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The Side Effects of Vaccines - How High is the Risk?

Vaccines are one of our best tools to prevent dangerous diseases, but they come with side effects. So would it be safer not to vaccinate?

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