First Dose of Pfizer Vaccine Increases Antibodies in Those with Prior COVID Infection

August 16, 2021

A team of doctors affiliated with the Rush University Medical Center recently wrote a research letter summarizing recent findings on Pfizer’s COVID-19 vaccine. Notably, the investigators “observed higher SARS-CoV-2 antibody levels in previously infected individuals after 1 dose of [Pfizer] compared with infection-naive individuals after two doses.” The study also found that those previously infected with COVID-19 saw an increased antibody response after the first dose, but did not see another significant increase following the second dose.

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