SACRAMENTO, Calif. — Outbreaks are underway at several state prisons among both inmates and staff, data from the California Department of Corrections and Rehabilitation show, amid a broader surge of COVID-19 spreading across California and nationwide. Prisons reported nearly 1,500 new inmate COVID-19 cases between May 1 and May 29, an almost 20-fold increase compared to just 75 infections reported over the preceding four weeks, according to a CDCR online data tracker. About 470 recent inmate cases were considered active as of Wednesday morning. That remains far below the 9,600 active cases rep…