Health Department

Fairfax County, Virginia

CONTACT INFORMATION: Our administration office at 10777 Main Street in Fairfax is open during regular business hours 8 a.m. - 4:30 p.m., Monday - Friday. Clinic services are not offered at this location. COVID-19 call center hours are Monday–Friday, 9am–5pm.

703-267-3511
TTY 711

10777 Main Street
Fairfax, VA 22030

Gloria Addo-Ayensu, M.D., M.P.H.,
Director of Health

Stay Up to Date with Your COVID-19 Vaccines

Staying Up to Date

COVID-19 vaccines work well to prevent severe illness, hospitalization, and death. Those who are unvaccinated remain at the highest risk for these serious outcomes of COVID-19. 

You are best protected when you are up to date on your vaccines. Being up to date means that you have received all doses in the primary series and at least one booster dose when you are eligible.

Being up to date is important because studies show protection against COVID-19 infection decreases over time. This means that people who have not received a booster dose are more likely to get sick with COVID-19 and possibly spread it to others.

The recommendations for booster doses are different depending on your age, your health status, what vaccine you first received, and when you first got vaccinated.

Vaccine Recommendations for Everyone Ages 5 Years and Older

Vaccine Brand for Primary Series Pfizer-BioNTech Pfizer-BioNTech Pfizer-BioNTech Moderna

Johnson & Johnson’s Janssen (J&J)***

Age (in years) 5-11 12-17 18+ 18+ 18+
Number of Doses in Primary Series Two doses, at least 3 weeks apart** Two doses, 3–8 weeks apart** Two doses, 3–8 weeks apart** Two doses, 4–8 weeks apart** One dose

Additional Dose Recommendation for Immunocompromised

Yes, see below

Yes, see below

Yes, see below

Yes, see below

Yes, see below

Booster Dose Recommendation

Pfizer-BioNTech vaccine at least 5 months after primary series

Pfizer-BioNTech vaccine at least 5 months after primary series

Pfizer-BioNTech or Moderna vaccine at least 5 months after primary series

Pfizer-BioNTech or Moderna vaccine at least 5 months after primary series

Pfizer-BioNTech or Moderna vaccine at least 2 months after primary series

Second Booster Dose Recommendation

Not at this time

Moderately or severely immunocompromised: Pfizer-BioNTech vaccine at least 4 months after first booster

50+: Pfizer-BioNTech or Moderna vaccine at least 4 months after first booster

18-49 & moderately or severely immunocompromised: Pfizer-BioNTech or Moderna vaccine at least 4 months after first booster

50+: Pfizer-BioNTech or Moderna vaccine at least 4 months after first booster

50+: Pfizer-BioNTech or Moderna vaccine at least 4 months after first booster

18-49 & received J&J as both primary series dose and booster dose: BioNTech or Moderna  vaccine at least 4 months after first booster

Fully Vaccinated*

14 days after second dose (primary series)

14 days after second dose (primary series)

14 days after second dose (primary series)

14 days after second dose (primary series)

14 days after your vaccine

Up to date

Immediately after first booster dose

Immediately after getting all recommended boosters

Immediately after getting all recommended boosters

Immediately after getting all recommended boosters

Immediately after getting all recommended boosters

* For someone who is moderately or severely immunocompromised, being fully vaccinated also means having received an additional vaccine dose. See below.

** Talk to your healthcare or vaccine provider about the timing for the second dose in your primary series.

  • People ages 12 through 64 years, and especially males ages 12 through 39 years, may consider getting the second dose of an mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) 8 weeks after the first dose. A longer time between the first and second doses may increase how much protection the vaccines offer, and further minimize the already rare risk of heart problems, including myocarditis and pericarditis.
  • People ages 5 through 11 years, people ages 65 years and older, people more likely to get very sick from COVID-19, or anyone wanting protection due to high levels of community transmission should get the second dose of Pfizer-BioNTech COVID-19 vaccine 3 weeks (or 21 days) after the first dose, or the second dose of Moderna COVID-19 vaccine 4 weeks (or 28 days) after the first dose.

*** Although mRNA vaccines are preferred, J&J/Janssen COVID-19 vaccine may be considered in some situations.

Boosters Dose Guidance

Use this interactive tool to see when you can get a booster dose, or review the guidance in the table above.

 

 

Guidance for People Who are Immunocompromised

If you are moderately or severely immunocompromised (have a weakened immune system), you are at increased risk of severe COVID-19 illness and death. Additionally, your immune response to COVID-19 vaccination may not be as strong as in people who are not immunocompromised.

It is important to stay up to date on your vaccines. If you are immunocompromised, this includes an additional dose in your primary series, and when eligible, a booster dose. You can use the booster tool above to see when you are up to date. 

There is no proof of medical condition required to receive a third dose of vaccine at one of the Fairfax County Health Department vaccination sites, and individuals will not be asked to provide medical documentation.

Vaccine Recommendations for People Who are Moderately or Severely Immunocompromised 

Dose Received

Pfizer-BioNTech

Pfizer-BioNTech

Moderna

Johnson & Johnson’s Janssen (J&J)

Age (in years)

5-11 years

12 years and older

18 years and older

18 years and older

Number of Doses to Complete Primary Series and Timing for People who are Immunocompromised 

3 doses of Pfizer-BioNTech: 

Second dose 3 weeks after first dose

Third dose at least 4 weeks after second dose

3 doses of Pfizer-BioNTech:

Second dose 3 weeks after first dose

Third dose at least 4 weeks after second dose

3 doses of Moderna:

Second dose 4 weeks after first dose

Third dose at least 4 weeks after second dose

Pfizer-BioNTech or Moderna vaccine 28 days after 1st dose of primary series

Booster Dose Recommendation for People who are Immunocompromised

Pfizer-BioNTech vaccine at least 5 months after the third dose

12- 17: Pfizer-BioNTech vaccine at least 3 months after the third dose

18+: Pfizer-BioNTech or Moderna* vaccine at least 3 months after the third dose

Pfizer-BioNTech or Moderna* vaccine at least 3 months after third dose

Pfizer-BioNTech or Moderna* vaccine 2 months after additional primary dose

Second Booster Recommendation for People who are Immunocompromised

Not at this time

12- 17: Pfizer-BioNTech vaccine at least 4 months after the first booster dose.

18+: Pfizer-BioNTech or Moderna* vaccine at least 4 months after the first booster dose.

Pfizer-BioNTech or Moderna* vaccine at least 4 months after the first booster dose.

Pfizer-BioNTech or Moderna* vaccine at least 4 months after the first booster dose

*Although mRNA vaccines are preferred, J&J/Janssen COVID-19 vaccine may be considered in some situations. 

Ready to get a vaccine?

Find a location near you!

Lose your vaccine card?

The Virginia Immunization Information System is the registry for immunization history, and you can request a copy of your COVID-19 record and QR code.

If you cannot locate your COVID-19 vaccination record, please call 877-VAX-IN-VA (877-829-4682), Monday through Friday from 8 a.m. to 6 p.m. ET. 

Additional Information

Terms to know

What is the difference between being up to date and being fully vaccinated?

  • Up to date means a person has received their primary series of a COVID-19 vaccine and has received at least one booster dose when eligible. Getting a second booster is not necessary to be considered up to date at this time.
  • Fully vaccinated means a person has received their primary series of a COVID-19 vaccine.

What is the difference between an additional dose and a booster dose?

  • A booster dose refers to another dose of a vaccine that is given to someone after a specified time following their primary series. Boosters are needed because protection against COVID-19 infection decreases over time (this is called waning immunity). 
  • An additional dose, or additional primary dose, refers to administration of another vaccine dose administered to someone who has a moderately or severely compromised immune system. Studies show that some immunocompromised people do not build the same level of immunity after vaccination a non-immunocompromised people and may benefit from an additional dose increase protection against COVID-19.
Fairfax Virtual Assistant