Data behind US COVID-19 booster plan shows waning vaccine effectiveness
Fox News
The data behind health officials’ plan to offer COVID-19 vaccine booster shots to fully vaccinated Americans showed waning effectiveness against infection for both authorized mRNA jabs.
The study out of New York, which focused on new COVID-19 cases and hospitalizations among adults between May 3 and July 25, found the age-adjusted vaccine effectiveness against diagnoses declined from 92% to 80% over time. The study involving nursing homes, which evaluated staff and residents from February 15 through August 1, saw that effectiveness against infection in nursing home residents went from 75% in pre-delta weeks down to 53% amid the variant’s rise. Another set of data, collected between January 2021 and July by the Mayo Clinic, saw Pfizer’s vaccine effectiveness go from 76% down to 42%, and Moderna’s decrease from 86% to 76%.
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