We found a strong positive linear correlation between the high magnitude of IFN-γ-producing CD4+ and CD8+ T cells specific to seven out of ten common T cell antigens and the “natural protection” observed in unvaccinated asymptomatic COVID-19 patients (Fig. 2B, Supplementary Fig. S2, and Supplementary Fig. S3). The gene discussed is CD4; the disease is COVID-19.