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New strains of COVID swiftly moving through the US need careful watch, scientists say

Karen Weintraub and Elizabeth Weise, USA TODAY Comments Off on New strains of COVID swiftly moving through the US need careful watch, scientists say

Each COVID-19 infection increases the risk of a mutation that could make it more infectious, deadlier, or different enough to make vaccines not work.

      
Karen Weintraub and Elizabeth Weise, USA TODAY
https://api-internal.usatoday.com.akadns.net

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