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a: Hematoxylin and eosin stain of lung sections from control C57BL/6 mice and anti-IL-12 treated mice on days 8 and 12 after RSV infection. Magnification, ×400. b: Peribronchial eosinophil numbers in control (IT vehicle only, no treatment) versus RSV control versus RSV/anti-IL-12 treated mice.
