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Additional Dose and Boosters

When should I get my booster?

Enter the date when you had your 2nd dose:



Where to find my 2nd dose date?
After receiving your 2nd dose, the date would be written on the white CDC COVID-19 Vaccination Record Card in the middle or you can locate it on your California Digital Vaccine Record. If you are having difficulty finding your 2nd dose date, please call the San Bernardino County COVID call center at 909-387-3911 for assistance or ask your provider.

Lost your vaccination card?
Please visit: https://sbcovid19.com/vaccinecards

Your recommended booster date is on or after: .

NOTE: Pfizer (i.e., Comirnaty) is the only vaccine currently authorized and recommended for a booster dose. Those who received a 2-dose Moderna or 1-dose Johnson & Johnson vaccine may be authorized for booster doses at a later date. It is not recommended to mix and match booster doses at this time (i.e., receive a Pfizer booster dose when you received Moderna or Johnson & Johnson).

Your 90 day period ended on .

You are considered susceptible to reinfection with COVID-19. If you are identified as a close contact to a person infected with COVID-19, please quarantine for 14 days from the date you were last exposed to the infected individual. Please take precautions to reduce your risk of exposure (i.e. social distancing, frequent handwashing, and wearing a mask when social distancing isn’t possible).

The CDC now recommends that people whose immune systems are compromised moderately to severely should receive an additional dose of mRNA COVID-19 vaccine after the initial 2 doses.

The CDC now recommends a booster dose for certain groups of people at least 6-months after receiving the Pfizer-BioNTech primary series to help increase their protection against COVID-19.

Frequently Asked Questions

Additional Dose:
CDC recommends moderately to severely immunocompromised people consider receiving an additional (third) dose of an mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) at least 28 days after the completion of the initial 2-dose mRNA COVID-19 vaccine series.

Booster Dose:
A Booster dose refers to another dose of a vaccine that is given to someone who built enough protection after vaccination, but then that protection decreased over time (this is called waning immunity). A booster shot of Pfizer-BioNTech’s COVID-19 vaccine at least 6 months after their Pfizer-BioNTech primary series, based on their individual benefits and risks.

The CDC now recommends a third vaccine dose for certain groups of people with weakened immune systems who received either the Pfizer-BioNTech or Moderna COVID-19 vaccine. Some examples below.

• Been receiving active cancer treatment for tumors or cancers of the blood
• Received an organ transplant and are taking medicine to suppress the immune system
• Received a stem cell transplant within the last 2 years or are taking medicine to suppress the immune system
• Moderate or severe primary immunodeficiency (such as DiGeorge syndrome, Wiskott-Aldrich syndrome)
• Advanced or untreated HIV infection
• Active treatment with high-dose corticosteroids or other drugs that may suppress your immune response

People should talk to their healthcare provider about their medical condition, and whether getting an additional dose is appropriate for them.

Effective September 24, 2021, the FDA, the Center for Disease Control and Prevention (CDC), and California Department of Public Health have opened eligibility for an additional booster dose of the mRNA COVID-19 vaccine Pfizer, also known as Comirnaty, at least 6 months after receiving their initial two doses to the following population groups:

There is no required proof outside of self-attestation. Self-attestation is a statement or written document to self-proclaim that you do meet the qualifications to receive an additional dose.

Addtional Dose Self-Attestation Form:
Self-Attestation for Moderately to Severely Immunocompromised People

Autoatestación para personas con sistema inmunitario que se encuentra comprometido de estado moderado a grave

Booster Dose Self-Attestation Form:
Self-Attestation for COVID-19 Booster Dose

Atestiguo para la Vacuna de refuerzo contra el COVID-19

Vaccines that are mRNA and additional-dose approved: Pfizer & Moderna

Vaccines that are mRNA and booster approved: Pfizer

Vaccine that is NOT additional-dose/booster approved: Johnson and Johnson

For people who received either Pfizer-BioNTech or Moderna’s COVID-19 vaccine series, a third dose of the same mRNA vaccine should be used. A person should not receive more than three mRNA vaccine doses. If the mRNA vaccine product given for the first two doses is not available or is unknown, either mRNA COVID-19 vaccine product may be administered.

The FDA’s recent EUA amendment only applies to mRNA COVID-19 vaccines, as does CDC’s recommendation.

Emerging data have demonstrated that immunocompromised people who have low or no protection following two doses of mRNA COVID-19 vaccines may have an improved response after an additional dose of the same vaccine. There is not enough data at this time to determine whether immunocompromised people who received the Johnson & Johnson’s Janssen COVID-19 vaccine also have an improved antibody response following an additional dose of the same vaccine.

Contact your provider directly to confirm if you need to bring your vaccine card.

If you make an appointment at an SB County Vaccine Clinic or special pop-up event please bring your vaccine card.

If you have lost your vaccine card please refer to this website: https://sbcovid19.com/vaccinecards/.

There is limited information about the risks of receiving an additional dose or booster dose of vaccine, and the safety, efficacy, and benefit of additional/ booster dose of COVID-19 vaccine continues to be evaluated. So far, reactions reported after the third mRNA dose were similar to that of the two-dose series: fatigue and pain at injection site were the most commonly reported side effects, and overall, most symptoms were mild to moderate.

NOTE: The FAQ above can be found on the CDC website at: https://www.cdc.gov/coronavirus/2019-ncov/vaccines/expect/after.html.

If it has been at least 28 days (4 weeks) or more since your 2nd dose then you can receive an additional dose of either Pfizer or Moderna.

Facts Sheets for Patients

Pfizer Patient Fact Sheet: https://www.fda.gov/media/144414/download

Moderna Patient Fact Sheet: https://www.fda.gov/media/144638/download

FDA Authorization for Providers

Pfizer Healthcare Provider EUA: https://www.fda.gov/media/144413/download

Moderna Healthcare Provider EUA: https://www.fda.gov/media/144637/download