The effectiveness of Pfizer’s Covid-19 vaccine steadily declines over time, dropping to about 84% for vaccinated people about four to six months after getting their second dose, according to CEO Albert Bourla.
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CNBC: Pfizer’s CEO says Covid vaccine effectiveness drops to 84% after six months
Vials containing doses of the Pfizer COVID-19 vaccine are viewed at a clinic targeting minority community members at St. Patrick's Catholic Church on April 9, 2021 in Los Angeles, California.
