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Growth curves of influenza A viruses PR8 and NIBRG-14 in the isolated ear fibroblasts of Mx1 transgenic piglets. Growth curves of PR8 at a MOI of 1 (A) and 0.01 (B). Growth curves of NIBRG-14 at a MOI of 1 (C) and 0.01 (D). Values represent the mean ± s.d., n = 3.
