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ELISA was used to determine the level of SP expression in cell-free BAL fluid from untreated FI-A2-vaccinated mice (A) or FI-A2-vaccinated mice treated with anti-SP antibody (aSP), anti-CX3CR1 antibody (aCX3CR1), or NRS (B) at 0, 8, 18, 24, and 40 h after A2, B1, CP52, PIV-3, or R10C7G challenge. The mean level of SP expression (± standard error) from three independent experiments examining three mice per treatment is shown.
