Two Shots of Pfizer Vaccine Don’t Last Against Coronavirus Plague Pandemic No Matter Your Age

Vials with Pfizer-BioNTech and Moderna coronavirus disease (COVID-19) vaccine labels are seen in this illustration picture taken March 19, 2021. (credit: REUTERS/DADO RUVIC/ILLUSTRATION/FILE PHOTO)

People vaccinated with two shots of the Pfizer coronavirus vaccine in January and February had a 51% increased chance of contracting the virus in July compared to those who were vaccinated in March or April, a new Israeli study published in Nature Communications has shown.

The team of researchers from KI Institute worked with doctors from KSM Research and Innovation and used data provided by Maccabi Health Services to conduct a retrospective cohort study comparing the incidence rates of breakthrough infections and COVID-19-related hospitalizations between people vaccinated toward the beginning of the country’s campaign (January and February) and those vaccinated toward the later stages (March and April). The study included more than 1.3 million records.

As noted, the risk of infection was significantly higher for people the earlier they were vaccinated, with an additional trend for high risk of hospitalization. The results, the researchers said, are consistent with other studies on the subject that show a decline in antibody levels and immune system compounds after four to six months.

Moreover, people’s ages had no effect on the vaccine’s waning, meaning that the vaccine waned for everyone and not just older people.

“The vaccine’s effectiveness wanes equally for everybody, according to the study,”  Dr. Barak Mizrahi, a researcher in computational health for KI Institute who led the study, said.

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SOURCE: The Jerusalem Post, Maayan Jaffe-Hoffman

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