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Lung pathology in offspring. Lung histopathology scores in RSV-infected litters born to unprimed (black symbols) or RSV-primed (red symbols) dams that were vaccinated once during pregnancy as indicated. Each symbol represents the mean of each litter. Lines across represent mean. Comparison of the histopathology between the respective mock-vaccinated, the test-vaccinated, or RSV i.m.-vaccinated groups was assessed by non-parametric Kruskal–Wallis test. *p < 0.05; #p < 0.005
