Effectiveness of Pfzier’s COVID-19 mRNA booster may drop in 3 months
Researchers analyzed more than 11,000 hospital admissions and emergency room visits to see how well COVID-19 vaccines prevent diseases. They found that all three doses of the Pfizer mRNA COVID-19 vaccine are highly effective in initially preventing hospitalizations. Although this high level of effectiveness is declining, experts say vaccines still offer key protection against COVID-19….