Michigan underreported tens of thousands of new weekly infections during the worst wave of the COVID-19, an error that state officials didn’t correct until last month. The Michigan Department of Health and Humans Services in October revised the onset date of roughly 200,000 COVID-19 infections and acknowledged to Bridge Michigan that, prior to those changes, the state had misreported the timing of roughly 6% of the 3.3 million cases since the pandemic began in March 2020. The state blamed the problem on a computer error, saying that as people got COVID-19 for a second or third time, some new infections...