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More contagious version of omicron spreads in US, fueling worries

By NPR  
   February 21, 2022

As the omicron surge continues to decline in the U.S., infectious disease experts are keeping a close eye on an even more contagious version of the variant that could once again foil the nation's hopes of getting back to normal. The virus, known as BA.2, is a strain of the highly contagious omicron variant that appears to spread even more easily — about 30% more easily.

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