Consistent with the higher KC and MIP-2 levels in A20myel-KO mice, the number of neutrophils (CD11b+ Ly6C+ Ly6G+ F4/80−) that were recruited in the bronchoalveolar spaces upon IAV infection was clearly higher throughout infection in A20myel-KO mice compared to control animals (figure 3D). Here, CALCA is linked to infection.