A study published yesterday in Clinical Infectious Diseases found that more than a quarter of the residents of a Chicago nursing home were infected with COVID-19, 37% of them never had symptoms, 37% were hospitalized, and 28% died.University of Illinois at Chicago researchers and public health officials investigating the facility's outbreak found that 33 of 126 residents tested had confirmed COVID-19, and another 2 who developed symptoms over 30 days of follow-up later tested positive.Nineteen (54%) of 35 infected residents had symptoms at testing, 1 (3%) of them developed symptoms later, and 13 (37%) never had symptoms.