What’s the difference between a COVID-19 booster shot and a third dose?


Dr. Eneida Roldan will administer the COVID-19 vaccine at the FIU vaccination site. January 27, 2021.Credits: Florida International University

The choice of COVID-19 vaccine is becoming more complex. So, if you’re confused about the different COVID-19 vaccines and who is eligible for what, you won’t feel sick. In addition to the three original vaccines approved by the Food and Drug Administration (Pfizer, Modana, Johnson & Johnson), booster shots and a third dose are now available. But they are not for everyone. And they are not the same.

Dr. Eneida Roldan, CEO of FIU Health and Clinical Director of the FIU Vaccine Initiative, explained the differences between the new shots.

“Booster shots are for people whose immune response may have weakened over time,” Roldan said. “The third dose is for people who may not have been strong enough Immune response From the first two doses. ” Healthcare workers; medical institutions Which one may be right for you.

There are some guidelines for eligibility from the Centers for Disease Control and Prevention (CDC).

Booster Shot: Pfizer only

The Federal Pharmaceutical Authority (FDA) only approves booster shots of the Pfizer vaccine.

Who is the target of the booster?

  • Boosters are only available to those who were first vaccinated with Pfizer. And they must have completed their first vaccination series at least 6 months ago.
  • 65 years of age or older
  • Lived in a long-term environment for over 18 years
  • Over 18 years of foundation Medical condition Immune weakness such as cancer, chronic liver, kidney disease. The CDC has a complete list of eligible conditions.
  • Over 18 years of age living or working in high-risk environments such as health care, schools, correctional facilities, and homeless shelters.

Third dose-Pfizer and Moderna

The third dose is only approved for the Pfizer and Moderna vaccines. “All three doses must be given the same vaccine. You have to wait at least 28 days after the second dose,” says Roldan.

Who is eligible for a third dose?

People with moderate to severe immune system weakness. For this Cancer treatment, Organ or stem cell transplant recipients taking drugs to suppress the immune system, and people with immunodeficiency.

Why get these additional shots?

“Additional doses may prevent serious and perhaps life-threatening COVID-19 in people who may not have responded to the first vaccine series,” the CDC said.

There are no approved booster shots or third doses of Johnson & Johnson vaccine. However, on October 5, the company requested the FDA to grant booster immunization to people who received the one-shot vaccine.

Who is eligible for the first COVID-19 vaccine?

The CDC currently recommends COVID-19 vaccination for all persons over the age of 12.Pfizer only vaccination Currently approved for children under the age of 16, pharmaceutical companies want to extend to smaller children. Pfizer has applied for approval for use in children aged 5 to 11 years.

Pfizer seeking FDAOK for COVID-19 vaccine booster dose

Quote: What is the difference between the COVID-19 booster shot and the third dose? (October 8, 2021) Obtained October 8, 2021 from https: //medicalxpress.com/news/2021-10-difference-covid-booster-shot-dose.html

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