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Moderna CEO Stephane Bancel on kick off of phase three Covid-19 vaccine trial

Moderna announced Monday it had received an additional $472 million from the U.S. government to support the company's late-stage development of its vaccine including the phase three study, which began Monday and will include more than 30,000 participants. Moderna CEO Stephane Bancel joins "Squawk Box" to discuss.
Mon, Jul 27 20208:23 AM EDT