CD40LG and infection: Firstly, the univariate regression model indicated the variables, such as gender, age group, CRP levels, PCT levels, SAA levels, IL-6 levels, ALT levels, DDi levels, WBC, NEUT, LYM, Hb, PLT, and SARS-CoV-2 IgM, made no statistic difference between asymptomatic and symptomatic infection with a p-value ≥0.20.