Health & Medical

Pfizer COVID Vaccine Antibodies May Disappear in 7 Months, Study Says

Oct. 4, 2021 — Antibody ranges might wane after 7 months for individuals who acquired the Pfizer-BioNTech vaccine, based on a brand new examine printed on the bioRxiv preprint server.

In the examine, which hasn’t but been peer-reviewed or formally printed in a medical journal,

researchers analyzed blood samples from 46 wholesome younger or middle-aged adults after receiving two doses, after which 6 months after the second dose.

“Our examine exhibits vaccination with the Pfizer-BioNTech vaccine induces excessive ranges of neutralizing antibodies towards the unique vaccine pressure, however these ranges drop by practically 10-fold by 7 months,” the researchers informed Reuters.

In about half of the adults, neutralizing antibodies have been undetectable at 6 months after the second dose, notably towards coronavirus variants corresponding to Delta, Beta, and Mu.

Neutralizing antibodies solely make up a part of the physique’s immune protection towards the virus, Reuters famous, however they’re nonetheless “critically necessary” in defending towards coronavirus infections.

“These findings recommend that administering a booster dose at round 6 to 7 months following the preliminary immunization will probably improve safety,” the examine authors wrote.

BioNTech stated a brand new vaccine system will probably be wanted by mid-2022 to guard towards future mutations of the virus, based on the Financial Times.

“This yr, [a different vaccine] is totally unneeded, however by mid-next yr, it could possibly be a unique state of affairs,” Ugur Sahin, MD, co-founder and CEO of BioNTech, informed the information outlet.

Current variants, particularly the Delta variant, are extra contagious than the unique coronavirus pressure however not totally different sufficient to evade present vaccines, he stated. But new strains could possibly evade boosters.

“This virus will keep, and the virus will additional adapt,” Sahin stated. “This is a steady evolution, and that evolution has simply began.”

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