claim: blood test detects past infections with new coronavirus
evidence_1: a new clinical blood test will start being conducted at the uw medicine virology lab, beginning next week, to check people for past infection with sars-cov-2.", "it could spot a past infection with this new coronavirus and not confuse it with other viruses, including other respiratory coronaviruses.", "the test looks for the presence of an antibody, called igg, which people produce in fending off the pandemic coronavirus.")