Fig. 3

Protein expression of a granzyme B and b perforin in nasal lavage fluid. *p < 0.05 vs. air control, # p < 0.05 vs. baseline (day 0), Mann-Whitney test. c NK cell cytotoxic activity against EOL-1 target cells as determined via flow cytometry, n = 7 individual subjects. d % Dead NK cells after 24 h culture with 10 μg/mL diesel particles. * p < 0.05, Mann-Whitney test. A = Air exposure, D = Diesel exhaust exposure, number indicates days post-LAIV treatment