COVIDs severity were classified according to the guidelines by medical physicians.2 Although about three quarters (74%) of patients had lymphopenia, 27 (28.1%) patients had a positive result for Ag1 and 39 (40.6%) had a positive Ag2 (IFN-γ ≥ 0.15 IU/mL) (Supplementary Table 2). The gene discussed is IFNG; the disease is lymphopenia.