CDC Says 2 Doses of Vaccine Offer Greater Protection Against Coronavirus Variants

By Anna Breuer on 1 March 2021
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A nurse at a N.Y.C. vaccine center waits for a patient

Individuals who have received two doses of coronavirus vaccine are better protected against variants of the virus than those who have had just one dose, the experts at the U.S. Centers for Disease Control and Prevention said Monday.

“Five studies have shown that postponing the second mRNA dose may leave some people less protected against the SARS-Cov-2 variants,” Dr. Heather Scobie said at a meeting of the CDC’s Advisory Committee on Immunization Practices.

Messenger RNA, also known as mRNA, is genetic material that contains instructions for making proteins. MRNA vaccines for Covid-19 such as those from Moderna and Pfizer/BioNTech contain synthetic mRNA.

Referring to the variants first seen in the United Kingdom and South Africa,Scobie said that “[A]ll of the studies showed improved neutralization of B.1.1.7 and B.1.351 after the second vaccine dose.”

Studies conducted in Israel, which has the world’s highest number of vaccinated citizens on a per capita basis, show how the vaccines protect people from the variants.

“The Pfizer vaccine was shown to have high real world effectiveness of 86% against symptomatic and asymptomatic disease in the UK and 84% against symptomatic disease in Israel during times when B.1.1.7 was prevalent,” Scobie said.

(Photo: Accura Media Group)

Accura News

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