On June 8, Banner Health sounded the alarm on the rising number of coronavirus cases in Arizona. The number of people on ventilators had quadrupled since the state reopened on May 15, the health system said. Banner Health operates in eight states and is the largest health system in Arizona. It’s managing nearly half the people hospitalized with confirmed or suspected coronavirus cases in the state, Dr. Marjorie Bessel, the health system’s chief clinical officer and COVID-19 lead told Business Insider.