CD40LG and COVID-19: Others utilize time-resolved fluorescence immunoassays (Goldsite Diagnostics Inc. SARS-CoV-2 IgG/IgM Kit), while some are based on colloidal gold immunoassays (Assay Genie COVID-19 rapid POC kit and VivaDiagTM SARS-CoV-2 IgM/IgG rapid test).