About 60% of the second transfer cells produced IL-17 in the absence of IL-10 on day 8 post infection, compared to 25% in the setting with IL-10 (Fig. 8c), and the IL-17 production of the second transfer cells was linked to the protection against influenza virus infection in IL-10KO mice (Supplementary Note 3, Supplementary Fig. 4). This evidence concerns the gene IL17A and infection.