Pfizer Inc. began shipping the vaccine on Sunday, according to Army Gen. Gustave Perna of Operation Warp Speed, the Trump administration's vaccine development program. UPS and FedEx were expected to deliver the vaccine to nearly 150 distribution centers across the nation on Monday, with an additional 425 sites getting shipments Tuesday, and the remaining 66 on Wednesday. "We anticipate receiving the first shipment in the state on Monday," Nevada Gov. Steve Sisolak said at a virtual news conference Sunday afternoon. The state expects to receive more than 23,000 doses this week.