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Pfizer COVID vaccine antibodies may disappear in 7 months, says study


October 4, 2021 — Antibody levels may drop after 7 months for people receiving Pfizer-BioNTech Vaccination, according to a new study Published on the bioRxiv preprint server.

In the study, which has not yet been peer-reviewed or formally published in a medical journal,

Researchers analyzed blood samples from 46 healthy young or middle-aged adults after taking two doses and again 6 months after the second dose.

“Our Study Shows Immunization With Pfizer-BioNTech” Vaccination The original vaccine induces high levels of neutralizing antibodies against the strain, but these levels drop by about 10-fold by 7 months. told Reuters.

In about half of adults, 6 months after the second dose, especially coronavirus Variants like Delta, Beta and Mu.

Reuters noted that neutralizing antibodies are only part of the body’s immune defense against the virus, but they are still “critically important” in protecting against coronavirus infection.

“These findings suggest that giving a booster dose approximately 6 to 7 months after initial vaccination will increase protection,” the study authors wrote.

BioNTech said a new vaccine formula would be needed by mid-2222 to protect against future virus mutations. till financial Times.

“this year, [a different vaccine] Totally unnecessary, but by the middle of next year, it could be a different situation,” Ugur Sahin, co-founder and CEO of BioNTech, told the news outlet.

current variants, ie delta versionThey are more contagious than the original coronavirus strain, but not enough to avoid current vaccines, he said. But the new strains may be able to survive the booster.

“This virus will persist, and the virus will become more adaptable,” Sahin said. “It’s an ongoing development, and that development has just begun.”

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