The Tennessee Department of Health is following CDC recommendations and providing a booster dose of the Pfizer COVID-19 vaccine to certain populations.

Eligible individuals may choose which vaccine they receive as a booster dose (i.e. "mix and match" vaccines). The Williamson County Health Department only administers the Pfizer vaccine. 

Pfizer and Moderna

For individuals who received a Pfizer-BioNTech or Moderna COVID-19 vaccine, the following groups are eligible for a booster shot at 6 months or more after they complete the initial series:

Johnson & Johnson:

  • Individuals who are 18 years and older and received the single-shot Johnson & Johnson vaccine are recommended to get a booster two or more months after their initial vaccine.

Key Points:

  1. The Williamson County Health Department ONLY has the Pfizer vaccine available
  2. Bring your vaccine card when getting a booster
  3. Appointments are recommended to keep wait time minimized
  4. Patients do not need to prove their diagnosis or health condition to be eligible for the booster dose
  5. Booster vaccines are also widely available
Booster Clarification Lists

Boosters vs Additional Dose:

  • Booster: a dose of vaccine when the initial sufficient immune response to a primary vaccine series is likely to have waned over time.
  • Additional dose or "third" dose: administration of an additional vaccine dose when the initial immune response following a primary vaccine series is likely to be insufficient. If you are looking for info on additional mRNA doses for immunocompromised individuals, click here.


Read More:

  • The Williamson County Health Department news release on boosters and mix-and-matching can be found here.
  • The Williamson County Health Department news release on Pfizer booster doses can be found here.
  • More information on the CDC’s recommendation for a booster dose is available here.
  • Further details on Pfizer booster recommendations for healthcare providers can be found here.