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How to Register for a Third Dose of COVID-19 Vaccine

Who is eligible to get the additional dose?

Booster Dose

Everyone ages five and older should get a COVID-19 vaccine booster shot.

  • See here for the CDC’s interim clinical considerations for the use of the COVID-19 vaccine. 

If you received Pfizer-BioNTech COVID-19 Vaccines

  • Everyone ages five years and older who received a Pfizer-BioNTech COVID-19 vaccine should get a booster shot at least 5 months after completing the primary (2-dose) COVID-19 vaccination series.

If you received Moderna COVID-19 Vaccines

  • Everyone ages 18 years and older who received a Moderna COVID-19 vaccine should get a booster shot at least 5 months after completing the primary (2-dose) COVID-19 vaccination series.

If you received Janssen (J&J) COVID-19 Vaccine

  • Everyone ages 18 years and older who received a Janssen (J&J) COVID-19 vaccine should get a booster shot at least 2 months after the primary (single dose) COVID-19 vaccination.

Third Dose

This additional vaccine (Pfizer and Moderna) should be considered for people with moderate to severe immune compromise due to a medical condition, or receipt of immunosuppressive medications or treatments. This includes people
who have:

  • Active treatment for solid tumor and hematologic malignancies
  • Receipt of a solid-organ transplant and taking immunosuppressive therapy
  • Receipt of CAR-T-cell or hematopoietic stem cell transplant (within 2 years of transplantation or taking immunosuppression therapy)
  • Moderate or severe primary immunodeficiency (such as DiGeorge syndrome, Wiskott-Aldrich syndrome)
  • Advanced or untreated HIV infection
  • Active treatment with high-dose corticosteroids (≥20mg prednisone or equivalent per day), alkylating agents, antimetabolites, transplant-related immunosuppressive drugs, cancer chemotherapeutic agents classified as severely immunosuppressive, tumor-necrosis (TNF)  blockers, and other biologic agents that are immunosuppressive or immunomodulatory.  

Booster for Immunocompromised (Fourth Dose) 

Immunocompromised individuals who received their third dose of Pfizer or Moderna vaccine in August may now schedule an appointment for a booster for immunocompromised (fourth dose), five months after completing the primary series per CDC guidance. Only immunocompromised individuals qualify for a booster for immunocompromised (fourth dose) at this time. We encourage you to talk to your healthcare provider to see if a booster for immunocompromised (fourth dose) is right for you.

If you’ve registered with the portal previously:

  • First, try using the “Book your vaccine appointment here” link in one of your previously sent emails.
    • The link may direct you to the map of available vaccine locations where you can select and book an appointment.
  • If you receive an error when trying to use the previous email, please re-register using an alternate phone number or email address that is different than your first registration.
    • The phone number can belong to you, or a family member or friend.
    • After registering and booking your appointment, you will be able to change your information by telling the clerk when you arrive at the vaccination site.
  • If you have used an invitation code in the past sent to you from the vaccination site, the old code should not be entered when trying to book a third dose.
    • Simply leave the space blank, or answer “no” to the question asking if you received an invitation code and proceed to entering the captcha and selecting “next”.
    • Invitation codes were sent to a small number of people to accommodate vaccine clinics not open to the public and specifically set up for small groups, businesses, schools, etc.  

If you’ve never registered with the portal:

Need Assistance?

Call 2-1-1
A call center team member can help find and book your appointment.

County Health Departments Vaccination Availability

County health departments are offering vaccine availability with several options. At this time appointments are available on the portal and through walk-in or by calling your local health department directly.

Nearly all county health departments offer walk-in appointments on a first come, first serve basis while crowds are manageable. Please check your local health department’s Facebook page and/or website for days and times of walk-in clinics in your area. 

Vaccination FAQs

Oklahoma’s CDC-approved vaccine distribution plan prioritizes our frontline workers and neighbors who are most at risk from COVID-19.

State Update Hub

Receive real-time updates on the vaccine: how much is available, how it’s being distributed statewide and when and where Oklahomans can access it.

About the Vaccine

The COVID-19 vaccine goes through a strict testing and approval process before it can be administered to Oklahomans.

As part of the preparation process for the arrival of a COVID-19 vaccine, the Center for Disease Control and Prevention (CDC) required each state to put together a comprehensive plan describing what the implementation of the new vaccine may look like for their jurisdiction. The plan outlined here is a draft for Oklahoma that was submitted to the CDC on October 16. This plan will be updated pending any feedback from the CDC in the coming weeks.

Attention: Eligible customers can schedule a vaccine appointment via the Walmart, Sam’s Club or Walgreens websites once appointments are available. Vaccines will be available to those who meet the current phase of vaccine eligibility in Oklahoma.

Vaccine Scheduling Tool for Oklahoma County Residents

The Oklahoma City-County Health Department has launched, a new website to schedule local COVID-19 vaccine appointments for Oklahoma County residents.

The Vaccine Scheduler Portal is an online scheduling tool to help Oklahomans determine when they are eligible to receive the COVID-19 vaccine and help them schedule an appointment when it is their turn.

Video #1: Portal Registration

Video #2: Scheduling Appointment

Video #3: Changing/Cancelling Appointment

To become a vaccine provider, please complete this enrollment (you also can click Enroll Now button below). Before you start, please read about the enrollment process.

If you have any question, please contact the Immunization Service team at or at (405) 426-8580.

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