In the coming months, this change will allow millions more Americans to get additional protection.
The original vaccine series is still very effective at protecting people against severe COVID illness that requires hospitalization.
However, boosters are recommended because data has shown that theeffectiveness of the first shotscan decrease over time.

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That means that Americans might be more vulnerable to breakthrough infections, especially asnew variants of the virus emerge.
Where Can I Get a Booster?
Last year, the CDC launched the websiteVaccines.govto help people find where to get vaccinated.
Your county health website may have additional information as well.
Children and teens 517 years old may only get a Pfizer COVID-19 vaccine booster.
you could look for appointmentshere.
Do Boosters Have Side Effects?
However, the Moderna booster shot is half the dose of the original shots.
For the most recent updates on COVID-19, visit ourcoronavirus news page.
Centers for Disease Control and Prevention.COVID-19 vaccinations in the United States.
Centers for Disease Control and Prevention.COVID-19 vaccine booster shots.
Centers for Disease Control and Prevention.CDC recommends additional boosters for certain individuals.