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Influenza A (H1N1) viruses have been widely found in different species, hence different strains have been demonstrated to infect various species such as birds, pigs and humans. During this year a new influenza virus has recently emerged from a reassortment between triple reassortant swine virus and the Eurasian influenza A swine virus lineage.1 Since the World Health Organisation’s declaration of a new pandemic, the virus has continued to spread to different countries, with a higher number of cases in North and South America, of which Chile has emerged as one of the most affected countries worldwide2 (fig 1).
Competing interests None.
Provenance and Peer review Not commissioned; not externally peer reviewed.
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