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AstraZeneca Covid vaccine slightly less effective than 1st touted: 76% rather than 79% against virus

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interim data from a 32,000-person trial conducted this winter in the US, Chile and Peru.American health officials had publicly rebuked the company for using "outdated information" when calculating that the vaccine was 79% effective.That marked a new setback for the vaccine that was once hailed as a milestone in the fight against the novel coronavirus pandemic, but has been dogged by questions over its effectiveness and possible side-effects.However, AstraZeneca reiterated that the shot, developed with Oxford University, was 100% effective against severe or critical forms of the infection.The drug firm also said the Covid-19 vaccine showed 85% efficacy in adults 65 years and older.The latest trial data, which has yet to be reviewed by.

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