No significant differences in the percentage of the T helper cell populations in SARS-CoV-2-specific CD4+ T cells were found between the SAb and DAb groups (Supplementary Figure S5B), indicating that early after mild infection, the balance between T(f)h1, T(f)h2, and T(f)h17 cells is not associated with longevity of the SARS-CoV-2 antibody response. This evidence concerns the gene CD4 and infection.