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Delta coronavirus variant becomes dominant U.S. strain as experts urge vaccinations

As CBS News' Nancy Chen reports, the Delta variant has become the dominant strain of the coronavirus in the U.S. Cases are already spiking in areas with low vaccination rates. Dr. Brittani James, a family medicine physician and co-founder of the Institute for Antiracism in Medicine, joins CBSN's Lana Zak with more.
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