AstraZeneca released updated data on its COVID-19 vaccine, saying a more recent analysis shows the vaccine is 76 percent effective against symptomatic COVID-19. It’s a slight drop from the 79 percent the company touted in an announcement earlier this week. That number was based on outdated data, US health officials said in an unusual public statement rebuking the company.
The original efficacy was based on an interim analysis using data collected until February 17th. But adding more data collected after that date showed that the vaccine may have been 69 to 74 percent effective, according to a letter from the independent panel monitoring the clinical trial and reported by The Washington Post. The panel “strongly recommended” those...
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Adjusted AstraZeneca data shows COVID-19 vaccine 76 percent effective
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March 25, 2021
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