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Study: Pfizer COVID-19 Vaccine Is Only About 33% Effective

  • December 01, 2021

Researchers studying a cohort of 787 health care workers have found that the Pfizer COVID-19 vaccine not only loses its efficacy within a few months, but drops by a whopping 57% by six months after the second dose. Initial studies of BNT162b2 by Pfizer and BioNTech in 2020 estimated the efficacy of the biologic to prevent serious symptoms of COVID disease at 95 percent. A “real world” study of 4,000 health care workers conducted by the U.S. Centers for Disease Control and...
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