April 5, 2021 The view inside Dexcom’s regional distribution center in east Mesa, hours before the state-run vaccination site opened. (Photo by Katelyn Keenahan/Cronkite News) The state-run site at Dexcom’s regional distribution center in east Mesa began giving COVID-19 vaccinations Monday. It will be open from 7 a.m. to 5 p.m. daily. (Photo courtesy of Shane Dieffenbach) Arizonans line up for the COVID-19 vaccine at Dexcom’s regional distribution center in east Mesa on Monday. (Photo courtesy of Shane Dieffenbach) PHOENIX – The Arizona Department of Health Services on Monday opened an indoor drive-thru vaccination site at Dexcom’s regional distribution center in Mesa, providing more comfort for all involved as temperatures approach triple digits.