Thursday, March 31, 2022

COVID-19 booster essential, even among individuals previously infected

A long-term, cohort study led by researchers at the Azrieli Faculty of Medicine of Bar-Ilan University and Ziv Medical Center in Safed has produced further insight regarding the interplay between COVID-19 infection and vaccination in providing protection over time.

Seven to nine months after the second dose of the vaccine, antibody levels throughout the cohort dropped and were comparable in all groups including among young people and those infected before vaccination. The booster, however, led to antibody levels ten times higher than after the second dose in all groups within the cohort.

The study, recently published in the journal Clinical Infectious Diseases, further showed that all individuals, including those with hybrid immunity (infected and vaccinated) require subsequent boosters beyond the two initial COVID-19 vaccine doses.

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