CD40LG and COVID-19: Third, with regard to thrombosis in a patient‘s personal history, COVID-19 severity and aPLA when discharged from the hospital was compared to admission and 3-month follow-up; patients who had prior thrombosis had significantly higher transient increases in aPLA (aCL IgG, aCL IgM, and anti-2GPI IgG) than patients who did not have thrombosis.