Additional studies are needed to support it and to further understand the significance and dynamics of the cellular immunity and humoral immunity function to SARS-CoV-2, including the duration of memory B cells and plasma cells in vivo [39,40,41] and the continuance of SARS-CoV-2-specific IgG and IgM antibody levels in patients recovering from COVID-19 [42]. This evidence concerns the gene CD40LG and COVID-19.