Moreover, the number of lymphocytes/μL in acute COVID-19 patients moderately correlated with the IFN-γ T-cell and IgG response against spike (SR = 0.318; p = 0.019 for T-cells; SR = 0.553; p = 0.009 for IgG; Supplementary Figure S2a,b). The gene discussed is IFNG; the disease is COVID-19.