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 for whom the protection may have decreased over time (this is called waning immunity). If you are moderately to severely immunocompromised, you should be receiving the additional third dose at this time, not a booster. Note that third vaccines and booster shots may have different timeframes and/or doses.  

The CDC and FDA recommend that you typically receive the same vaccine. For example, if you received the two-dose primary series of the Pfizer vaccine, you should typically get the Pfizer booster. Mixing and matching of the manufacturer’s vaccines for boosters are now allowed. 

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Booster Shot Eligibility

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The CDC now recommends a booster dose of the COVID-19 vaccine if you received your two dose primary series (Moderna or Pfizer) or single primary dose of Johnson & Johnson Janssen COVID-19 vaccine. Eligibility is as follows: 

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Get Your Booster

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Booster shot appointments are now available for qualified individuals. Appointments for booster vaccines are highly recommended and are administered at the Baylor Medicine Vaccine Clinic on McNair Campus located at 7200 Cambridge Street - Suite 6B Houston, TX 77030. 
  
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

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Graphic of a Covid-19 booster recommendation flow chart