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U.S. top medical advisor: a second booster for COVID-19 vaccine is not surprising

Category: World

Date: 2021-09-19T07:06:21+0000
U.S. top medical advisor: a second booster for COVID-19 vaccine is not surprising
Shafaq News/ White House chief medical advisor Dr. Anthony Fauci said Thursday he would not be surprised if the recommended full regimen for the Pfizer and Moderna Covid-19 vaccines in the U.S. becomes three doses, instead of two.

Giving people an additional dose, or perhaps a final dose, several months after they've received their initial vaccination helps the immune system mature, said Fauci, also the director of the National Institute of Allergy and Infectious Diseases.

The plan, outlined by senior health officials last month, calls for a third dose eight months after people get their second shot of either the Pfizer or Moderna vaccines.

Federal health officials, citing three new studies released by the Centers for Disease Control and Prevention, said vaccine protection against Covid infection diminished several months after people received their second dose.

Health experts say it is not uncommon for vaccines to require more than two doses. Vaccinations for hepatitis B and HPV, for example, require third doses, with several months between the second and third shot.

While Americans may eventually need to get a third shot, some health experts have urged officials not to call them "boosters." That's because, like other vaccines, Americans may not need more boosters at a later time.

Fauci said Thursday he would leave it up to the Food and Drug Administration and other regulators to make a determination on the full regimen, but added it is reasonable to believe three doses would provide a more durable immune response.

"If it is durable, then you're going to have very likely a three-dose regimen being the routine regimen," he said.

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