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Temporal appearance of MxA resistance-enhancing amino acids in NPs of Eurasian avian-like swine IAV. Shown is the consecutive acquisition of MxA resistance-enhancing NP mutations in the 1918, “classical” North American swine, and Eurasian avian-like swine lineages. For more-detailed information, see reference 8, Fig. 4, and Fig. S2 in the supplemental material.
