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As highly transmissible Omicron subvariant spreads, what do Americans need to know?

The World Health Organization said the highly transmissible Omicron subvariant known as BA.2 is continuing to fuel a rise in COVID-19 cases in 18 European countries. Dr. Tom Frieden, a former CDC director and the president and CEO of Resolve to Save Lives, explained to CBS News how concerned the U.S. should be about a new wave.
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