A booster shot is a second dose of vaccine. This is given to someone who has had a decline in their immune response since the last dose. You've probably had a booster shot for tetanus as part of your regular immunizations.
You remind your body how it can fight disease by getting a booster shot. Your immune system is ready to defend you against that disease if it happens.
Booster shots to COVID-19
After being vaccinated, it is possible to be positive for COVID-19. Vaccinations offer the best protection against severe illnesses.
The Food and Drug Administration (FDA), has approved booster doses of all three COVID-19 vaccinations currently available in the U.S. These booster shots do not replace existing vaccines. These booster shots are an addition dose of existing COVID-19 vaccinations. A booster dose may be lower than the original dose depending on the individual's age.
There are many factors that influence the recommendation for booster shots:
The Centers for Disease Control and Prevention (CDC), has a new tool that can help you decide when and if your child can receive one or more COVID-19 boosters. The tool can be found on their website.