On Monday, the CDC published a study that shows mRNA vaccines are “highly effective” at preventing COVID-19 infections, including asymptomatic cases. The study, which analyzed the effectiveness of Moderna and Pfizer mRNA vaccines, featured data from 3,950 first responders and frontline workers in the United States.
The study showed “that following the second dose of vaccine (the recommended number of doses), risk of infection was reduced by 90 percent two or more weeks after vaccination.” Researchers were also able to determine that a single dose of either vaccine reduced recipients’ risk of infection “by 80 percent two or more weeks after vaccination.”
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