FDA grants authorization to Moderna for 2nd COVID-19 vaccine

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This September 2020 photo provided by Johnson & Johnson shows a single-dose COVID-19 vaccine being developed by the company. Johnson & Johnson is beginning a huge final study to try to prove if the single-dose vaccine can protect against the coronavirus. (Cheryl Gerber/Courtesy of Johnson & Johnson via AP)

The U.S. Food and Drug Administration has authorized use of a second COVID-19 vaccine for people age of 18 and over, a move that will trigger the shipment of millions more doses to hospitals and nursing homes within days.

Like its competitor Pfizer, the Moderna vaccine was believed to be both safe and highly effective. After tracking some 30,000 volunteers, Moderna estimated it as 94% effective in preventing COVID-19 illness with few serious side effects.

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