Baylor College of Medicine

COVID-19 Vaccine Booster Shot

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About Booster Shots

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A booster shot is a dose of a vaccine that is given to someone who is already vaccinated and received protection from that vaccination, but then that protection decreased over time (this is called waning immunity). Additional third doses of the COVID-19 vaccine are currently available to moderately to severely immunocompromised people.

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Booster Shot Eligibility

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The CDC now recommends a booster dose of the Pfizer-BioNTech (Comirnaty) vaccine be given six months after completing the second dose of the Pfizer vaccine for specific populations:

  • People 65 years of age and older
  • Residents of long-term care facilities

  • People age 50-64 with underlying medical conditions that put them at high risk of complicated COVID or severe disease 

  • People aged 18–49 years with underlying medical conditions may receive a booster shot of Pfizer-BioNTech’s COVID-19 vaccine at least six months after their Pfizer-BioNTech primary series, based on their individual benefits and risks.

  • People aged 18-64 years who are at increased risk for COVID-19 exposure and transmission because of occupational or institutional setting may receive a booster shot of Pfizer-BioNTech’s COVID-19 vaccine at least six months after their Pfizer-BioNTech primary series, based on their individual benefits and risks.

The Pfizer booster shot is not authorized for use in people who received the Moderna or Johnson & Johnson’s Janssen vaccine(s). Vaccines continue to provide people with strong coverage against severe illness. We anticipate information about Moderna booster doses soon and studies are still being done on boosters for Johnson & Johnson’s Janssen vaccine.

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Get Your Booster

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Starting September 24, 2021 booster vaccine appointments will be available for qualified individuals. Appointments for booster vaccines are by appointment only and are administered at the Baylor Medicine Vaccine Clinic on McNair Campus located at 7200 Cambridge Street - Suite 6B Houston, TX 77030.
 
In addition, appointments are available at the Baylor Medicine Vaccine Clinic on September 25, 2021. 

Detailed instructions on how to sign up to receive your COVID-19 vaccine booster can be found below in the FAQs “Receiving the Booster Shot at Baylor Medicine” section.

Register to Receive Your Booster
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Frequently Asked Questions

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We know you have questions about the COVID-19 vaccine booster shot, many of which are answered below. We will continue to update this page as new information becomes available.

Updates and FAQs are also available on separate pages for the third dose and primary series of the COVID-19 vaccine.

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About the Booster Dose

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Receiving Your Booster at Baylor Medicine