The University of Michigan shuts down all sports activities for two weeks after the B.1.1.7 variant of SARS-CoV-2 is discovered in five people with ties to the school. (MLive.com), (MLive.com 2) COVID-19 pandemic in Michigan, Variant of Concern 202012/01COVID-19 pandemic in the United StatesCOVID-19 pandemic in North AmericaCOVID-19 pandemic link embed save