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  1. Serotipos. En 1930 se definieron dos categorías principales de H. influenzae: cepas con cápsula y sin ella. La patogénesis de las infecciones de H. influenzae no se comprende totalmente, aunque la presencia del tipo B encapsulado (HiB) es el principal factor de virulencia.

  2. Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus which can cause illness in humans and many other animal species. A bird-adapted strain of H5N1, called HPAI A(H5N1) for highly pathogenic avian influenza virus of type A of subtype H5N1, is the highly pathogenic causative agent of H5N1 flu, commonly known as avian influenza ("bird flu").

  3. L'influenza spagnola, conosciuta anche come la spagnola o la grande influenza, fu una pandemia influenzale di natura virale e insolitamente mortale, ...

  4. Influenza suina (in inglese swine influenza o swine flu) è il nome con cui ci si riferisce ai casi di influenza provocati da contagio di Orthomyxovirus nei suini ed in particolare l'influenza C e i sottotipi conosciuti come H1N1, H1N2, H2N1, H3N1, H3N2 ed H2N3 dell'influenza A. Il virus si trasmette difficilmente dal suino all'uomo.

  5. Village pump – Forum for discussions about Wikipedia itself, including policies and technical issues. Site news – Sources of news about Wikipedia and the broader Wikimedia movement. Teahouse – Ask basic questions about using or editing Wikipedia. Help desk – Ask questions about using or editing Wikipedia.

  6. Swine influenza virus is a virus that is common in pigs. This type of influenza virus can also infect humans and birds. Swine influenza virus is sometimes called SIV or swine flu. Swine flu is common in pigs. Normally, it only infects people who have been in close contact with pigs. However, the disease has also spread from one person to another.

  7. Influenza D virus is 50% similar in amino acid composition to influenza C virus, similar to the level of divergence between types A and B, while types C and D have a much greater level of divergence from types A and B. Influenza viruses C and D were estimated to have diverged from a common ancestor over 1,500 years ago, around 482 AD.

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