Federal and State regulatory agencies have provided authorization for certain groups to receive booster or third doses. Our Boosters and Third Doses webpage offers clarification on who is eligible to receive an additional dose of the COVID-19 vaccine, who is eligible to receive a booster shot, the difference between third doses and booster shots, and where to get yours.
Update, March 30, 2022:
Today, California Department of Public Health (CDPH) and Western States Scientific Safety Review Workgroup (WSSSRW) approved a second booster dose of the Moderna or Pfizer COVID-19 vaccine for certain groups. The additional booster shot is for people who received their first booster more than four months ago and are:
- Age 50 & older
- Age 18 & older with moderate / severe immunosuppression
- Age 12-17 with moderate / severe immunosuppression (Pfizer booster only)
FDA and CDC's authorized a second booster dose for those groups on March 29. In addition, CDPH and CDC recommend anyone who received a primary vaccine and booster dose of Johnson & Johnson at least four months ago is eligible to receive an additional Pfizer or Moderna booster dose.
Examples of moderate or severe immunosuppression include people on chemotherapy or who have had a solid organ transplant, like a kidney transplant or heart transplant. This also includes people who have an immunodeficiency, have an advanced or untreated HIV infection, or are undergoing treatment with high-dose corticosteroids or other medications that suppress immune response.
Are you newly eligible for a second booster dose? Contact your doctor or medical provider to see if getting an additional booster dose is right for you. Marin County Public Health will begin offering second booster doses by appointment only at select locations beginning Thursday, March 31. If you meet these criteria, you can book your shot at My Turn.
Some people experience side effects from the COVID-19 vaccine. Side effects are usually mild and generally happen within 6 weeks of receiving a vaccination. It is for this reason the FDA required each of the authorized COVID-19 vaccines to be studied for at least two months (eight weeks) after the final dose.
Some common side effects include:
- Pain, redness, or swelling at the injection site
- Muscle pain
For more information, visit the CDC webpage: Possible Side Effects After Getting a COVID-19 Vaccine
A “third dose” of a COVID-19 vaccine is administered to individuals with weakened immune systems who have not responded fully to initial doses.
A “booster” dose is administered when the response to initial vaccination might have decreased to levels that increase vulnerability.
Visit our Boosters and Third Doses webpage to learn more about third doses and boosters.
Stay up to date with the latest information about booster and third doses by visiting our Boosters and Third Doses page. Also you can also follow the latest information on the California Department of Public Health (CDPH) and CDC websites.