Information on Additional Vaccine Doses (Booster Shots and Third Doses) in Montgomery County

by MCS Staff

Content verified October 29, 2021, courtesy of Montgomery County.

Eligible people

If you are eligible, you may choose  any of the available COVID-19 vaccines as your booster. If you want a specific vaccine as your booster, check that your vaccination site has it available.

Booster Shot Eligibility
If you got this vaccine Moderna or Pfizer series (2 shots) Johnson & Johnson (1 shot)
When Second shot at least 6 months ago At least 2 months ago
In one of these groups Age 18 and older
You may receive any one of these vaccines as your booster shot

Available locations

See County-run clinics and vaccine typesUse Maryland’s vaccine locator to find pharmacies and other providers. Your healthcare provider may have vaccine, too.

Items to bring to your appointment

Bring these items to your additional dose appointment

You will be required to self-certify underlying medical conditions and age.

You do not need a doctor’s note or medical history.

Are there risks of receiving an additional vaccine dose?

Limited information exists about the risks of receiving an additional dose of vaccine. Ongoing research is looking at the safety and benefit of additional doses of COVID-19 vaccines.

So far, reactions reported after a third dose of an mRNA vaccine were similar to those for first and second doses. The most common side effects reported have been fatigue and pain at the injection site. Overall, most side effects have been mild to moderate.


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