Low hemagglutinin-titer strains of pandemic influenza A (H1N1) 2009 virus circulated in Toyama Prefecture, Japan, during the 2009-2011 influenza seasons.

Jpn J Infect Dis, 2011;64(5):448-50.

Obuchi M[1], Yokoyama M, Horimoto E, Obara M, Iwai M, Sato H, Sata T, Takizawa T

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PMID: 21937833

Impact factor: 2.541

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