The COVID-19 vaccine from Pfizer and BioNTech is highly effective against symptomatic COVID-19 for at least six months after a second dose, a new analysis has shown.
The companies on Thursday announced that in an analysis of its phase 3 study that included 927 symptomatic COVID-19 cases, the vaccine was 91.3 percent effective "measured seven days through up to six months after the second dose." It was also 100 percent effective against severe disease as defined by the CDC, as well as 95.3 percent effective against severe disease as defined by the FDA, the companies said. There were no serious safety concerns.
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