U, Mayo Clinic ready COVID-19 antibody tests

The University of Minnesota and Mayo Clinic are close to unveiling antibody tests that can determine if people have already been infected by the coronavirus that causes COVID-19 and are no longer threats to get or spread the infection. State health officials see these tests as a key part of Minnesota’s pandemic response, because they could define the breadth of the outbreak and maybe identify previously infected individuals who could move about in public freely and volunteer in response efforts.