First COVID-19 vaccines arrive at Methodist Dallas Medical Center The first vaccine was administered shortly after 10 a.m. to 51-year-old Teresa Mata, an environmental services employee who cleans rooms in the emergency department at Methodist. UPS driver Paul Pieroni, 55, delivers a shipment of the Pfizer COVID-19 vaccine arrives to Methodist Dallas Medical Center in Dallas on Monday, Dec. 14, 2020. The hospital is one of four sites across Texas receiving the shipment today. Pieroni, a UPS driver for 28 years, said it was humbling to bring the vaccines on their final leg of their trip to Methodist. He’d lost a relative to the disease weeks earlier.(Lynda M. González / Staff Photographer)