CD40LG and antiphospholipid syndrome: Further analyses on prothrombotic disease were performed such as tests for lupus anticoagulant, anticardiolipin antibodies immunoglobulin G (IgG) and immunoglobulin M (IgM), beta 2 glycoprotein IgM and IgG, and chorionic gonadotropin, which were negative and ruled out pregnancy or antiphospholipid syndrome considering that the thrombotic event was secondary to COVID-19 infection.