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CDC reveals "pivotal discovery" about the delta variant as cases surge

The CDC says the "war has changed" in the coronavirus pandemic, as the delta variant fuels a surge in cases. As Michael George reports, experts say vaccinated people can spread the virus just as easily as the unvaccinated. Then, Max Bayer joins CBSN's Lana Zak with the latest on the variant and U.S. efforts to get ahead of it.
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