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Replication of CIVs in vivo. The nasal turbinates, tracheas, tonsils, and lungs were collected from dogs infected with H3N8 (A and B) or H3N2 (C and D) CIVs at 3 dpi (A and C) or 5 dpi (B and D) and processed for virus titration. Values represent means and standard deviations (n = 3). The dashed black horizontal lines indicate the lower limits of detection. *, P < 0.05.
