WASHINGTON (AP) — The U.S. Food and Drug Administration is refusing to consider Moderna’s application for a new flu vaccine made with Nobel Prize-winning mRNA technology, the company announced Tuesday ...

Add Yahoo as a preferred source to see more of our stories on Google. Moderna said the FDA's refusal was inconsistent with previous feedback from the agency. - Graham Hughes/Bloomberg/Getty Images The ...

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The efficacy of flu shots is not always the same and it’s not always optimal. Some years, they can reduce the risk of illness by as little as 20% to 30%. Messenger RNA technology, or mRNA, is widely ...