WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.New research suggests the coronavirus was spreading in the U.S. weeks before public officials previously thought. Modeling from Northeastern University suggests thousands of cases may have spread undetected throughout several major cities in January and February, long before an official case was reported. Also, in Tennessee, the Gallatin Center for Rehabilitation and Healing is being sued after more than 161 residents caught the coronavirus and 19 people died. Debbie Bolton lost her 89-year-old mother, Clara Ruth Summers. She shares her story.