After a Second Shot
Side effects after the second shot may be more intense than the ones experienced after the first shot. These side effects are normal signs that the body is building protection and should go away within a few days.
If You Received a Booster Shot
So far, reactions reported after getting a booster shot were similar to those after the two-dose or single-dose primary series. Fever, headache, fatigue and pain at the injection site were the most commonly reported side effects, and overall, most side effects were mild to moderate. However, as with the two-dose or single-dose primary series, serious side effects are rare, but may occur.
When to Call the Doctor
Side effects can affect you or your child’s ability to do daily activities, but they should go away in a few days.
In most cases, discomfort from pain or fever is a normal sign that the body is building protection. Contact a doctor or healthcare provider:
- If the redness or tenderness where the shot was given gets worse after 24 hours
- If the side effects are worrying or do not seem to be going away after a few days
If you or your child get a COVID-19 vaccine and you think you or they might be having a severe allergic reaction after leaving the vaccination site, seek immediate medical care by calling 911. Learn more about COVID-19 vaccines and rare severe allergic reactions.
CDC continues to closely monitor the safety of COVID-19 vaccines. If scientists find a connection between a safety issue and a vaccine, FDA and the vaccine manufacturer will work toward an appropriate solution to address the specific safety concern (for example, a problem with a specific lot, a manufacturing issue or the vaccine itself).
If you would like to report an adverse event, side effect or reaction from the COVID-19 vaccine, please use the following link: https://vaers.hhs.gov/external icon
Enroll in v-safe
After vaccination, enroll yourself or your child in v-safe, a free, easy-to-use, and confidential smartphone-based tool that uses text messaging and web surveys to provide personalized health check-ins after COVID-19 vaccination. Through v-safe, you can report how you or your child is feeling after getting vaccinated. V-safe also reminds you to get your second dose. Learn more about v-safe.