title: More vigilance needed for variant swine influenza virus.
mesh_terms: D000818:Animals; D005062:European Union; D014644:Genetic Variation; D006801:Humans; D053122:Influenza A Virus, H3N2 Subtype / Q000235:genetics*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control; D058873:Pandemics / Q000517:prevention & control; D011159:Population Surveillance; D013552:Swine / Q000821:virology*