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.
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Mon, Jul 27 20208:23 AM EDT