Iowa reported 568 new COVID-19 cases as of 11 a.m. Saturday for the previous 24-hour period. That marked a single-day total higher than the state’s peak rolling seven-day average of 559.One death was reported in Polk County, bringing the total number of statewide deaths due to COVID-19 to 721.The current seven-day rolling average for positive cases was 427 — a jump from a rolling average of 400 cases in the previous 24-hour period.