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Emergency medicine physician: ‘There’s nothing stopping the spread of this virus’

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Dr. Dara Kass joins Lawrence O’Donnell to discuss a possible January surge of Covid-19 cases after the TSA reported screening over 1.2 million travelers on the last day of the Christmas weekend, the highest number of airline travelers since the start of the pandemic. She tells Lawrence that “no matter how many people we vaccinate, it means nothing if the virus continues to spread exponentially.”

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