3rd Dose & Booster

Third Dose: A third dose of an mRNA COVID-19 vaccine (Pfizer and Moderna) is now part of the recommended primary vaccination series for immunocompromised individuals. Studies have indicated that this population cannot develop the expected high level of protection against COVID-19 infection with a two-dose series.

If you meet the following criteria, you are eligible for a third dose through the Chemung County Health Department.
You must sign an attestation form on-site stating that you meet the eligibility criteria.
- You are moderately or severely immune-compromised due to a medical condition or immunosuppressive medication.
- You have already received two doses of either Pfizer or Moderna.
- At least 28 days have passed since your second dose of either Pfizer or Moderna.

Booster Dose: Booster shots have demonstrated the ability to safely increase people’s protection against infection and severe outcomes and are an important public health tool to strengthen defenses against the virus. All adults over 18 should now have equitable access to a COVID-19 booster dose.

For individuals who received the Pfizer or Moderna vaccines, the CDC recommends a single booster dose six months or more after the completion of the initial series. For individuals who previously received a primary dose of the Johnson & Johnson/Janssen vaccine, a single booster dose vaccine is recommended at least two months after the administration of the first dose. The health department recommends individuals receive a booster dose that is the same brand as the primary vaccination series, but patient preference for vaccine brand will be allowed.


Pfizer is a two-dose vaccine 3 weeks apart for anyone age 5 and older.
*A parent or guardian must be present to provide consent for individuals 5 - 17 years old.

Moderna is a two-dose vaccine 4 weeks apart for anyone age 18 and older.

Johnson & Johnson/Janssen is a one-dose vaccine available for anyone age 18 and older.