Booster Shots & Additional Doses
updated: January 7, 2022
COVID-19 Vaccine - Booster Doses
Inyo County's Public Health/COVID-19 Response Team recommends you speak with your primary physician to see if a Booster Dose OR an Additional Dose is recommended for you at this time. If so, you may visit any provider in Inyo County offering COVID-19 vaccines. If you need assistance, please email us at VaccineInfo@inyocounty.us and we would be happy to answer any questions or help you make an appointment.
COVID-19 Vaccine booster shots are available for the following vaccine recipients:
Pfizer-BioNTech / COMIRNATY:
A Booster Dose of the Pfizer vaccine is recommended if you:
- Received your second dose at least five (5) months ago, and
- Are age 12 or older
A Booster dose of the Moderna vaccine is recommended if you:
- Received your second dose at least six (6) months ago, and
- Are age 18 or older
Janssen-Johnson & Johnson:
A Booster dose of the Johnson & Johnson vaccine is recommended if you:
- Received your first dose of the Johnson & Johnson vaccine at least two (2) months ago, and
- Are 18 or older
Heterologous (Mix-and-Match) Boosters
**Quick-find local clinics: www.inyocounty.us/covid19-vaccines/vaccine-clinics
The CDC has determined that individuals eligible for a booster dose may receive a dose that is either the same as OR different from their primary COVID-19 vaccine series, depending on advice from a healthcare provider, individuals preference, availability, or convenience.
COVID-19 Vaccines for Moderately to Severely Immunocompromised People
What You Need to Know
- People with moderately to severely compromised immune systems are especially vulnerable to COVID-19, and may not build the same level of immunity to 2-dose vaccine series compared to people who are not immunocompromised.
- This additional dose intended to improve immunocompromised people’s response to their initial vaccine series.
- CDC recommends that people age 5 years of age and older, with moderately to severely compromised immune systems receive an additional dose of mRNA COVID-19 vaccine at least 28 days after a second dose of Pfizer-BioNTech COVID-19 vaccine
- CDC recommends that people age 18 years of age and older, with moderately to severely compromised immune systems receive an additional dose of mRNA COVID-19 vaccine at least 28 days after a second dose of Moderna COVID-19 vaccine.
Data on Decreased Immune Response Among Immunocompromised People:
People who are moderately to severely immunocompromised make up about 3% of the adult population and are especially vulnerable to COVID-19 because they are more at risk of serious, prolonged illness.
Studies indicate some immunocompromised people don’t always build the same level of immunity after vaccination the way non-immunocompromised people do, and may benefit from an additional dose to ensure adequate protection against COVID-19. In small studies pdf icon[2 MB, 36 Pages], fully vaccinated immunocompromised people have accounted for a large proportion of hospitalized “breakthrough cases,” and that suggests immunocompromised people are more likely to transmit the virus to household contacts.
Individuals should talk to their healthcare provider about their medical condition, and whether getting an additional dose OR a booster dose is appropriate for them.
How long after getting my initial COVID-19 vaccines can I get an additional dose?
Can you mix and match the vaccines?
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.
What should immunocompromised people who received the J&J/Janssen vaccine do?
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.
What are the benefits of people receiving an additional vaccine dose?
An additional dose may prevent serious and possibly life-threatening COVID-19 in people who may not have responded to their initial vaccine series. In ongoing clinical trials, the mRNA COVID-19 vaccines (Pfizer-BioNTech or Moderna) have been shown to prevent COVID-19 following the two-dose series. Limited information suggests that immunocompromised people who have low or no protection after two doses of mRNA vaccines may have an improved response after an additional dose of the same vaccine.
What are the risks of vaccinating individuals with an additional dose?
There is limited information about the risks of receiving an additional dose of vaccine, and the safety, efficacy, and benefit of additional doses of COVID-19 vaccine in immunocompromised people 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.
However, as with the two-dose series, serious side effects are rare, but may occur.