Drug maker Moderna says it plans to ramp up production of its COVID-19 vaccine by 100 million more doses than what it originally forecast.The Massachusetts-based company said Monday it would produce 600 million doses in 2021.So far, the company says it has supplied 18 million doses of a promised 200 million to the U.S. government.U.S. states have been administering both the Moderna vaccine and a vaccine produced by Pfizer-BioNTech since late last month.Both vaccines are reportedly highly effective in preventing coronavirus infection.According to MarketWatch, Moderna’s stock is up 453.0% over the past year.  

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