Thus, we stimulated PBMC with either HA protein from influenza HS or inactivated whole virus from homologous A/Anhui/1/2013 (H7N9) influenza, and evaluated interferon γ (IFNγ) secretion as an indication of T-cell activation (Fig. 3G and Supplementary Fig. 6). The gene discussed is IFNG; the disease is influenza.