Pfizer COVID Vaccine Antibodies Could Disappear in 7 Months, Examine Says


Oct. 4, 2021 — Antibody ranges might wane after 7 months for individuals who bought the Pfizer-BioNTech vaccine, in keeping with a new examine revealed on the bioRxiv preprint server.

Within the examine, which hasn’t but been peer-reviewed or formally revealed 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 almost 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 similar 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 mentioned a brand new vaccine method will probably be wanted by mid-2022 to guard towards future mutations of the virus, in accordance to the Monetary Occasions.

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

Present variants, specifically the Delta variant, are extra contagious than the unique coronavirus pressure however not completely different sufficient to evade present vaccines, he mentioned. However new strains might be able to evade boosters.

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

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