Pfizer says an early peek at its vaccine data suggests the shots may be 90 percent effective at preventing COVID-19, indicating the company is on track later this month to file an emergency use application with US regulators.
Monday's announcement doesn't mean a vaccine is imminent: This interim analysis, from an independent data monitoring board, looked at 94 infections recorded so far in a study that has enrolled nearly 44,000 people in the US and five other countries.
Pfizer Inc. did not provide any more details about those cases, and cautioned the initial protection rate might change by the time the study ends. Even revealing such early data is highly unusual.
Read the full story on BostonGlobe.com.
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