ANN ARBOR – Approximately 220 students who reside in University of Michigan’s South Quad residence hall tested negative for COVID-19 after a cluster of cases was identified in the building on Sept. 18. After 19 positive cases were confirmed in the dorm, the University Health Service set up a pop-up testing site with the guidance of the Washtenaw County Health Department and in coordination with the School of Public Health and U-M Housing. Students residing in the two floors identified as the source of the cluster were tested within 36 hours. Although none were experiencing COVID-19 symptoms and had no close contact with those who tested positive, the university conducted the tests out of an abundance of caution. Starting in early October, U-M will introduce a widespread, voluntary testing program for asymptomatic students, faculty and staff on campus using samples of saliva.