CD40LG and COVID-19: In the study, IgM and IgG independent test showed high sensitivity (90.67%/ and 9.33%, respectively), high specificity (97.84% and 99.28%, respectively), and high accuracy (95.33% and 88.79%, respectively); especially, combination of IgM and IgG displayed better performance with 92.00% sensitivity, 97.12% specificity, and 95.33% accuracy, which indicated that the products were viable enough for clinical detection of COVID‐19 patients compared with other reagents.5