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Assessment of lung pathology at 11 days after PRRSV/PCV2 challenge. Ten vaccinated pigs (filled bars) and 10 nonvaccinated pigs (shaded bars) were randomly removed from the study at 11 days and were assessed for pneumonia. Results (means ± standard deviations) are presented as the percentage of gross lung involvement and the histopathology score. The differences between the vaccine and nonvaccine groups were not significant (P > 0.05).
