Moderna's COVID-19 Vaccine Becomes 2nd To Earn FDA Authorization

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Federal regulators have granted an emergency use authorization to the vaccine developed by Moderna, whose Massachusetts headquarters are seen here.

The Food and Drug Administration greenlights the biotech firm's vaccine for emergency use in the U.S. The move bolsters a vast inoculation effort that's already underway.

(Image credit: Elise Amendola/AP)