CD40LG and COVID-19: Recent commercially available lateral flow test kits such as Wondfo® SARS-CoV-2 Antibody Test (Guangzhou Wondfo Biotech Co., Ltd., Guangzhou, China), Innovita® 2019 n-CoV Ab Test Colloidal Gold (Biological Technology Co., Shanghai, China) and SGTi-flex COVID-19 IgM/IgG (Sugentech) also showed promising results.