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Histopathologic assessment of lung tissue from infected animals. Lung tissue was sectioned and stained for histopathology analysis as described in Materials and Methods. Each panel is a portion of a representative hematoxylin-eosin-stained section from the indicated group (Control or Elastase group, left margin) at a given time point (Mock, 6 h, 24 h, 48 h, or 72 h).
