Figure 1From: The first detection of influenza in the Finnish pig population: a retrospective studyPhylogenetic relationships of the Finnish influenza A viruses isolated in swine in 2009-2010 [[16],[20]-[25]]. (a) Phylogenetic tree based on 743 nucleotides of haemagglutinin gene. (b) Phylogenetic tree based on 560 nucleotides of neuraminidase gene.Back to article page