Booster Shots & Additional Doses

updated: September 29, 2021

Pfizer - Booster Dose

Read the updated CDC recommendation and media statement here.

COVID-19 Vaccine booster shots are available for the following Pfizer-BioNTech vaccine recipients:

  • Completed their initial series at least 6 months ago




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Pfizer & Moderna - Additional Doses - Immunocompromised people

The CDC recommends an additional dose of COVID-19 vaccine for immunocompromised people that received an mRNA (Pfizer or Moderna) vaccine. 

other vaccines

If and when additional dose recommendations are announced for additional categories or the general public, and/or the  J&J/Janssen COVID-19 vaccine, the information and guidance will be updated on this page. 


On August 12, 2021 the FDA approved Booster COVID-19 vaccine doses for immunocompromised individuals that received Pfizer or Moderna vaccines.

Inyo County's Public Health/COVID-19 Response Team recommends you speak with your primary physician to see if a booster dose is recommended for you at this time. If so, you may visit any provider in Inyo County offering COVID-19 vaccines and request an additional dose. Each eligible individual wishing to receive a booster dose should receive the same vaccine that they received in their original series.

If your physician feels you do not meet the immunocompromised requirement, there is a plan that the recommendation for an additional dose will be expanded to the general public in the fall. 

Booster doses for J&J/Janssen have not been recommended at this time.

If you need assistance, please email us at and we would be happy to answer any questions or help you make an appointment.


Read the full CDC Recommendation for COVID-19 Vaccines for Moderately to Severely Immunocompromised People here.

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.
  • Although CDC does not recommend additional doses or booster shots for any other population at this time, HHS has announced a plan to begin offering COVID-19 vaccine booster shots this fall.
  • CDC recommends that people 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 or 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.

Who Needs an Additional COVID-19 Vaccine?

Currently, CDC is recommending that moderately to severely immunocompromised people receive an additional dose.
This includes people who have:

  • 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.

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