AstraZeneca Says Vaccine Now 76% Effective

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AstraZeneca Says Vaccine Now 76% Effective
U.S. health officials had raised concerns over earlier conclusion shot was 79% effective.
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AstraZeneca says its COVID-19 vaccine is now 76% effective at preventing symptomatic cases of the disease. 

In a statement late last night, the British drugmaker announced it had recalculated its U.S. study data after reporting earlier this week the shot was 79% effective. 

Federal health officials had raised concerns over the company's previous conclusion, saying it was based on cherry-picked information. 

AstraZeneca plans to seek FDA approval for its vaccine in the coming weeks.