COVID-19 Vaccination Appointments
Boosters are listed in the table below in the Booster column. Children 5-11 years old are eligible for an original Pfizer booster. Updated (bivalent) boosters from Pfizer are available for people 12 years and older, and from Moderna for people 18 years and older. Updated boosters are for people who have completed the primary series and can be given 2 months after a COVID-19 vaccination. Appointments are required for updated booster vaccinations.To schedule, click on the vaccine type and age group in the table below, or call 1-855-MDGoVax (855-634-6829) for help by phone. Appointments are required for children 6 months to 5 years and updated boosters. For other types of appointments, walk-ins are seen as schedules allow, but appointments are preferred and given priority.
COVID-19 Vaccination C
NOTE: Clinic links in red require appointments.
Looking for another clinic location like a pharmacy? Call 1-855-MDGoVax (855-634-6829) or
9/2/2022 Update: updated boosters are authorized from Pfizer for people ages 12 years and older and from Moderna for people ages 18 years and older.
This is a single booster dose administered at least two months after completing the primary vaccination series or a booster vaccination.
Who is eligible for a booster?
Can I "mix and match" - or get a different kind of vaccine for my booster?
FDA and CDC have authorized "mix and match" for booster doses for people 18 years and older. Eligible individuals may choose which vaccine they receive as a booster dose. Children and teens ages 5-17 years who got a Pfizer primary series must get a Pfizer booster.
Updates: Pfizer boosters authorized on 9/23/2021, Moderna and Johnson & Johnson boosters authorized on 10/21/2021. Boosters authorized for everyone 18 years and older on 11/19/2021. Pfizer boosters authorized for everyone 16 and older on 12/10/2021. Pfizer boosters authorized for everyone 12 and older at least 5 months from their 2nd dose on 1/4/2022. Moderna boosters authorized for everyone 18 years and older at least 5 months after their second dose on 1/10/2022. Pfizer and Moderna 2nd boosters authorized for older adults and immunocompromised individuals on 3/30/2022. Pfizer first boosters authorized for children 5-11 years old on 5/20/2022.
Children get a smaller dose of COVID-19 vaccine than teens and adults that is the right amount for their age group. Moderna requires 2 doses spaced 1 month apart. Pfizer requires 3 doses with the second dose 3 weeks after the first, and the third dose at least 8 weeks after the second dose.
|6 months-4 years old||3 dose series (2 doses 3 weeks apart and third dose at least 8 weeks after second)||2 doses one month apart|
|5 years old||2 doses three weeks apart||2 doses one month apart|
|6-17 years old||2 doses three weeks apart||Not authorized|
FDA evaluation of Moderna and Pfizer vaccine for individuals 6 months through 17 years of age is available here.
The following vaccines are available as a primary series:
Note: the Johnson & Johnson (Janssen) vaccine is no longer available at Frederick County Health Department clinics.
Update 8/13/2021: third doses are now authorized in the updated EUA for people who are moderately or severely immunocompromised. Updated CDC guidance This includes:
Immunocompromised individuals may still have a reduced immune response and need to take steps to reduce their risk of exposure, such as:
Real Answers to Rumors
All Marylanders 5 years and older are currently eligible for vaccination and a booster.
Please call 1-855 MDGoVax (855-634-6829) for help scheduling an appointment.
Please bring documentation of your age and identity. You must be over 18 years to receive Moderna and Johnson & Johnson, and over 12 years to receive Pfizer. A parent or legal guardian must accompany anyone 17 years or younger.
Check https://www.vaccines.gov/ to find a specific kind of vaccine, and then call the location to verify their supply.