H1N1 H1N1 désigne un ensemble de virus de la grippe appartenant à la même lignée de type A, sous-type H1N1. Ils sont caractérisés par un pouvoir pathogène élevé pour l’Homme. Certaines souches de H1N1 sont endémiques chez les humains et provoquent une petite fraction de tous les syndromes grippaux et une grande fraction de l'ensemble la grippe saisonnière. Les différentes souches de H1N1 ont causé près de la moitié de toutes les infections de grippe humaine en 2006. D'autres souches de H1N1 sont endémiques chez les porcs (la grippe porcine) et chez les oiseaux (grippe aviaire). Attention et bien se laver les mains H1N1 Influenza A (H1N1) virus is a subtype of influenzavirus A and the most common cause of influenza (flu) in humans. Some strains of H1N1 are endemic in humans and cause a small fraction of all influenza-like illness and a large fraction of all seasonal influenza. H1N1 strains caused roughly half of all human flu infections in 2006. Other strains of H1N1 are endemic in pigs (swine influenza) and in birds (avian influenza). In June 2009, World Health Organization declared that flu due to a new strain of swine-origin H1N1 was responsible for the 2009 flu pandemic. This strain is commonly called "swine flu" by the public media. In the 2009 flu pandemic, the virus isolated from patients in the United States was found to be made up of genetic elements from four different flu viruses – North American Mexican influenza, North American avian influenza, human influenza, and swine influenza virus typically found in Asia and Europe – "an unusually mongrelised mix of genetic sequences."This new strain appears to be a result of reassortment of human influenza and swine influenza viruses, in all four different strains of subtype H1N1. Take Care and wash carefully your hands Thanks Magik