SIOUX FALLS, S.D. (AP) — Officials say more than 100 inmates at a South Dakota prison have tested positive for the coronavirus this week, as the state experiences some of the worst transmission rates in the country. The Department of Corrections says mass testing at the Mike Durfee State Prison in Springfield resulted in 127 positive tests among inmates for a total of 149 since the pandemic began. The South Dakota Department of Health reported 793 new cases Friday as well as three deaths. The new cases pushed the seven-day average of positive results to 657, up from 246 a month ago.