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Fig. 2S. Segments of H1N1 subtypes. Nucleotide sequences were aligned and analyzed. Green: human strains. Numbers indicates the area of detection: 1, North America; 2, Central America and Caribbean; 6, South West Europe; 7, South-East Asia; 8, Eastern Asia; A, avian virus; M and R, human strains; S, virus infected to human. The aligned sequences and accession numbers are also presented.
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Abbreviations: R, type R of human; M, type M of human; Sw, the human virus txid940568; Ia; the human triple reasortant virus txid398800. Blue, triple reassortant; Grey, swine; Green, human; A, abian.
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