More vaccines could be approved very soon. One from Johnson & Johnson and another from a company called Novavax. If authorized, this vaccine could be one of the most potent weapons against the pandemic. Early data shows that it could be the first shot to slow down asymptomatic spread and potentially provide longer-lasting protection. The other part of this story is the company itself, Novavax was a small biotech company that had tried to develop an approved vaccine with no success. Gregory Zuckerman, special writer at the WSJ, joins us for how Novavax turned its company around to make and effective Covid vaccine.

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