IFNG and common variable immunodeficiency: In relation to cellular response using a SARS-CoV-2 specific IGRA (Figures 2C, D), CVID phenotype patients had significantly lower IFN-γ levels than controls (855 U/mL; IQR 139-1205 vs. 1205 U/mL; IQR 1205-1205; p=0.011) and BCD patients (855 U/mL; IQR 139-1205 vs. 1205 U/mL; IQR 972-1205; p=0.038).