CBS News – Albert Bourla, the head of pharmaceutical giant Pfizer, which is among the companies developing a coronavirus vaccine, said Sunday there is a “good chance” the company will know whether its vaccine works by the end of October.

In an interview with “Face the Nation,” Bourla said it’s not yet known whether Americans will be able to receive a coronavirus vaccine before 2021, as issuance of a license depends on federal regulators. But studies from Pfizer indicate…

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