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Distribution of Moderna Inc’s COVID-19 vaccine to more than 3,700 locations in the United States has begun, vastly widening the rollout started last week by Pfizer Inc, U.S Army General Gustave Perna said on Saturday. Moderna has already moved vaccines from its manufacturing plants to warehouses operated by distributor McKesson Corp where they are being packed into containers and loaded on to trucks on Saturday, Perna said during a news conference. Trucks will set out on Sunday and shipments will start reaching healthcare providers as soon as Monday, he said. The Food and Drug Administration on Friday approved an emergency use authorization for Moderna’s vaccine, the second COVID-19 vaccine to be approved. The jab developed by Pfizer and its German partner BioNTech SE was approved Dec. 11....