Absence of RSV-induced inflammatory responses in lung and BAL following immunization with AdF.RGD. BALB/c mice were immunized subcutaneously with AdNull, AdF.RGD (both at 1010 pu), formalin-inactivated RSV (FIRSV, 105 pfu) or intranasally with RSV (106 pfu). Five wk later the mice were challenged intranasally with RSV (106 pfu) and lungs were harvested after 6 days. A-C. Lung histology (H+E stain): A. RSV, B. FIRSV, C. AdF.RGD. D. Quantification of cells in BAL. Data for D are shown as mean ± SEM of duplicate measurements of n = 4 mice/group and represent one of two independent experiments.