Choosing Your COVID-19 Booster Shot

Three COVID-19 vaccines are authorized or approved for use in the United States to prevent COVID-19. Pfizer-BioNTech or Moderna (COVID-19 mRNA vaccines) are preferred.  You may get Johnson & Johnson’s Janssen COVID-19 vaccine in some situations.


Who Can Get a Booster Shot

COVID-19 Booster Shot

If You ReceivedWhich Booster to Get?When to Get a Booster?Which Booster Should You Get?


Everyone 12 years and olderAt least 5 months after completing your primary COVID-19 vaccination series.
  • Pfizer-BioNtech or Moderna (MrNA COVID_19 vaccines) are preferred in most* situations
  • Teens 12-17 years old may only get a Pfizer-BioNTech COVID-19 vaccine booster


Adults 18 years and olderAt least 5 months after completing your primary COVID-19 vaccination series.
  • Pfizer-BioNtech or Moderna (MrNA COVID_19 vaccines) are preferred in most* situations

Johnson & Johnson's

Adults 18 years and olderAt least 2 months after completing your J&J/Janssen COVID-19 vaccination series.
  • Pfizer-BioNtech or Moderna (MrNA COVID_19 vaccines) are preferred in most* situations

*Although mRNA vaccines are preferred, J&J/Janssen COVID-19 vaccine may be considered in some situations

Schedule Your Booster Shot

COVID-19 Vaccines at San Antonio Regional Hospital

San Antonio Regional Hospital is a San Bernardino County Vaccination Center. For more information about San Antonio Regional Hospital vaccines visit:

If you need help scheduling your booster shot, contact the location that set up your previous appointment. If you need to get your booster shot in a location different from where you received your previous shot, there are several ways you can  find a vaccine provider.

    What to Expect During and After Your Booster Shot Appointment

    • Bring your CDC COVID-19 Vaccination Record card to your booster shot appointment so your provider can fill in the information about your booster dose. If you did not receive a card at your first appointment, contact the vaccination site where you got your first shot or your state health department to find out how you can get a card.
    • You may experience side effects after getting a COVID-19 vaccine. These are normal signs that your body is building protection against COVID-19.
    • Use v-safe to tell CDC about any side effects. If you enter your booster shot in your v-safe account, the system will send you daily health check-ins.


    If You Were Vaccinated Outside of the United States

    If you completed a Pfizer-BioNTech, Moderna, or J&J/Janssen COVID-19 vaccine primary series outside of the United States you should follow the guidance above for booster shots. 

    Otherwise, if you were vaccinated abroad with other COVID-19 vaccines you can get a booster shot if you are 16 years or older and you either: 

    • Received all the recommended doses of a World Health Organization emergency use listing (WHO-EUL) COVID-19 vaccineexternal icon, not approved or authorized by the U.S. Food and Drug Administration (FDA) 
    • Or completed a mix and match series composed of any combination of FDA-approved, FDA-authorized, or WHO-EUL COVID-19 vaccines 

    If you meet the above requirements you can get a single booster shot of Pfizer-BioNTech COVID-19 vaccine at least 6 months after getting all recommended doses or completing a mix and match COVID-19 vaccine series.


    Data Supporting Need for a Booster Shot

    Studies show after getting vaccinated against COVID-19, protection against the virus and the ability to prevent infection with variants may decrease over time and due to changes in variants.

    • Although COVID-19 vaccines remain effective in preventing severe disease, recent data suggest their effectiveness at preventing infection or severe illness wanes over time, especially in people ages 65 years and older.
    • The recent emergence of the Omicron variant further emphasizes the importance of vaccination, boosters, and prevention efforts needed to protect against COVID-19.
    • Data from clinical trials showed that a booster shot increased the immune response in trial participants who finished a Pfizer-BioNTech or Moderna primary series 6 months earlier or who received a J&J/Janssen single-dose vaccine 2 months earlier. With an increased immune response, people should have improved protection against getting infected with COVID-19. For Pfizer-BioNTech and J&J/Janssen, clinical trials also showed that a booster shot helped prevent severe disease.


    Frequently Asked Questions

    Yes. COVID-19 booster shots are the same ingredients (formulation) as the current COVID-19 vaccines. However, in the case of the Moderna COVID-19 vaccine booster shot, the dose is half of the amount of the vaccine people get for their primary series.
    Yes. COVID-19 vaccines are working well to prevent severe illness, hospitalization, and death. However, public health experts are starting to see reduced protection over time against mild and moderate disease, especially among certain populations.
    Adults and children may have some side effects from a COVID-19 vaccine, including pain, redness or swelling at the injection site, tiredness, headache, muscle pain, chills, fever and nausea. Serious side effects are rare, but may occur.
    Yes, the definition of fully vaccinated has not changed and does not include the booster shot. Everyone is still considered fully vaccinated two weeks after their second dose in a two-shot series, such as the Pfizer-BioNTech or Moderna vaccines, or two weeks after a single-dose vaccine, such as the J&J/Janssen vaccine. Fully vaccinated, however is not the same as optimally protected. To be optimally protected, a person needs to get a booster shot when and if eligible.
    Booster Shot

    Information gathered from CDC website.