CD40LG and COVID-19: The primary goal of this study was to evaluate the performance of five serological tests: Elecsys® Anti-SARS-CoV-2 (Roche Test), SARS-CoV-2 IgG (Abbott Test), Wondfo SARS-CoV-2 Antibody Test (Wondfo Test), ASK COVID-19 IgG/IgM Rapid Test (ASK Test), and Dynamiker 2019-nCoV IgG/IgM Rapid Test (Dynamiker Test) for the diagnosis of COVID-19.