Mice were infected with a 4LD50 inoculum of IAV. Indicated cell populations were enumerated in the lungs by flow cytometry at three days post -infection. (A, B) Data were pooled from two separate experiments, n=5-8 per group. (C, D) Data were pooled from two separate experiments, n=10 per group. Error bars represent SEM. *p<0.05, **p<0.01, student's t-test.