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Pfizer says its antiviral COVID-19 pill is 89% effective in preventing hospitalizations

Pfizer says its antiviral COVID-19 pill is 89% effective at prevent hospitalizations and 100% effective against deaths from the virus if taken within three days of a person experiencing symptoms. Dr. John Moore, professor of microbiology and immunology at Weill Cornell Medical College, joins CBSN's Tanya Rivero to discuss the potentially life-saving drug.
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