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October 17, 2021
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26 September 2021

Pfizer COVID-19 Vaccine Booster Dose

Pfizer COVID-19 Vaccine Booster Dose

Medical experts have found that the COVID-19 vaccines remain highly effective in preventing COVID-19 associated hospitalizations and deaths in most age groups, but that protection begins to wane after several months in older adults. As with other vaccines, a booster shot will strengthen the body’s ability to prevent disease from the virus that causes COVID-19. Results from a clinical trial and a large study in Israel found that a third dose of Pfizer vaccine 6 months after receipt of the second dose provides a strong boost to the body’s immune response to the virus that causes COVID-19. Based on scientific evidence, booster doses of the Pfizer vaccine are now recommended for some groups of people at least six months after their second dose, as shown below:

Those who should receive a booster dose of Pfizer:

  • Adults age 65 and older and those living in long-term care facilities 
  • Adults age 50-64 with underlying medical conditions or who are at increased risk of social inequities

Those who may receive a booster dose:

  • Adults age 18 through 64 years:
    • with underlying medical conditions, or 
    • who are at increased risk for SARS-CoV-2 exposure and transmission because of where they work or live, such as teachers, grocery store employees, health care workers and people who live in congregate care settings.

The CDC strongly recommends equity as a factor in who receives a booster dose so people disproportionately affected by long-standing health care inequities can access the care they need. 

Booster doses have not yet been recommended for people who received the Moderna or Johnson & Johnson vaccine. It is expected that federal officials will consider booster doses for people who’ve received these vaccines in coming weeks.

Booster shots are widely available, but eligible people may need to schedule an appointment.  Don't worry while you wait for your booster shot.  Your Pfizer vaccination still offers protection against COVID-19 virus. 

CDC: Pfizer-BioNTech COVID-19 Vaccine Booster Shot What You Need to Know