A mysterious blood-clotting complication is killing coronavirus patients Once thought a relatively straightforward respiratory virus, covid-19 is proving to be much more frightening Ariana Eunjung Cha Craig Coopersmith was up early that morning as usual and typed his daily inquiry into his phone. “Good morning, Team Covid,” he wrote, asking for updates from the ICU team leaders working across 10 hospitals in the Emory University health system in Atlanta. One doctor replied that one of his patients had a strange blood problem. Despite being put on anticoagulants, the patient was still developing clots. A second said she’d seen something similar....