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How mRNA vaccines can keep up with an ever-changing coronavirus – ABC News

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As new COVID 19 variants are rapidly spreading across the world, vaccine manufacturers are preemptively finding ways to adapt to the emerging threats.
Moderna announced Wednesday it had dosed the first patient in a study to test a booster shot against one of the new variants.
New vaccines typically take many months to invent, develop and refine. But vaccines from Moderna and Pfizer rely on cutting-edge, highly adaptable mRNA technology, which can be rapidly modified to keep up with the virus as…

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