• COVID-19 Response Team

Pfizer Booster Shots Now Available

The Maryland Department of Health has approved the administration of a third “booster” dose of Pfizer vaccine for individuals who meet specific criteria. Booster doses are different than an “additional dose” for immunocompromised individuals.


You are only eligible to receive Pfizer booster dose if:


1. Both of your previous shots were Pfizer and your second dose was at least 6 months ago; AND


2. One of the following is true:

  • You are 65 years or older;

  • You live in a long-term care setting;

  • You are age 18-64 and at increased risk for COVID-19 exposure and transmission because of your work or institutional setting (ex. Medical professionals, correctional officers)

  • You are 18-64 with a serious underlying medical condition (see form for complete list of qualifying conditions).


To receive your booster dose, you may register for an appointment at any Pfizer clinic offered by the Health Department. When you get to the fourth page of the registration, select that this is your third shot.


You will be required to fill out the Self-Attestation of Eligibility Form for Pfizer Booster Vaccination prior to receiving your shot. You may complete the form at home and bring it with you, or you can complete it at the vaccination site. Vaccine Center staff will access your vaccine record to confirm that you received Pfizer and that your second dose was at least six months ago prior to authorizing the booster shot.


A “booster dose” is a supplemental vaccine dose given to people when the immune response to a primary vaccine series is likely to have decreased over time. The Centers for Disease Control and Food and Drug Administration are currently reviewing data on how immunity obtained from a Moderna or Johnson & Johnson vaccine changes over time. Booster doses are not currently authorized for any vaccine other than Pfizer.


An “additional dose” is recommended for people who may not have received adequate protection from their initial vaccine series. Those with weakened immune systems don’t always build the same level of immunity after vaccination the way non-immunocompromised people do. People who are moderately to severely immunocompromised are recommended to get an additional dose to increase their immune response so they have protection against COVID-19.


People who are immunocompromised and received Pfizer or Moderna vaccinations are eligible for an additional dose of vaccine. Learn more about additional doses and your eligibility based on your specific medical condition here.


To receive your additional dose, you may register for an appointment at a Pfizer or Moderna clinic offered by the Health Department. You should register for the same type of shot as your first two doses. When you get to the fourth page of the registration, select that this is your third shot.


You will be required to fill out the Self-Attestation of Eligibility Form for Immunocompromised prior to receiving your shot. You may complete the form at home and bring it with you, or you can complete it at the vaccination site. Vaccine Center staff will access your vaccine record to confirm the type of vaccination you received that you received and that your second dose was at least 28 days ago prior to authorizing the additional shot.


If you have questions about the process for receiving a booster vaccine or additional dose, please contact our Call Center at (410) 479-5880.

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