In severe cases of COVID-19, an exuberant activation of immune cells resembles that seen in acute flares of SLE..

New research from Emory University School of Medicine points towards tests that could separate some COVID-19 patients who need immune-calming therapies from others who may not. It also may begin to explain why some people infected with SARS-CoV-2 produce abundant antibodies against the virus, yet experience poor outcomes.