 (A) Absolute cell counts from lungs of sub-lethally influenza virus infected mice following analysis by flow cytometry. After gating out alveolar macrophages by forward and side scatter, immune cells are defined as follows: Neutrophil (Ly6G+CD11b+SiglecF-Ly6Cint), Eosinophil (SiglecF+CD11c-/+F4/80-CD64-), Monocyte (Ly6G-CD11b+MHCII-SiglecF-), Natural killer cell (NK, B220-/intNK1.1+), B cell (B220hiNK1.1-), CD8+ T cell (TCRβ+CD8+), CD4+ T cell (TCRβ+CD4+) Data information: Data are representative of three independent experiments with 3-4 mice per group and represented as mean ± S.E.M. Statistical significance in (A) was determined with unpaired student's T-test. n.s.= not significant 