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Key features of influenza viruses. Orthomyxovirusss segmented RNA genome8 segments6 of the 8 segments in SO-H1N1 A were from swine influenzaLipid envelope with matrixProteins project through the envelope: M2, haemagglutinin (H or HA) and neuraminidase (N or NA)HA contains 2 polypeptides, HA1
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