Gripe porcina
Gripe porcina. (Volver a Cronología. Personas. Fuentes.)
Surge en 1918 por contagio desde la versión humana de la gripe aviar, continuó evolucionando hasta la actualidad (fue descubierta en 1931), mientras que la versión humana desapareció entre 1957 y 1977:
In 1931 Rockefeller Institute investigator Richard E Shope (1901–1966) published the first three of a series of landmark papers [70–72] establishing the aetiology of ‘swine influenza’ or ‘hog flu’, the new epizootic disease of pigs that had been noted initially during the autumn wave of the 1918 influenza pandemic [30,31]. It is now believed that the pandemic virus appearing in 1918 was transmitted from humans to pigs, at that time splitting off into two lineages, one human, the other porcine [73] (reviewed in [74]). Both lineages persist today, the classical swine influenza lineage having evolved continually since 1918, and the human lineage having caused pandemic and endemic influenza from 1918 to 1956. The human line apparently disappeared entirely around 1957 only to reappear in 1977, after possible release from a freezer [75], and has continued to circulate endemically in humans up to the present time.
(Volver a Cronología. Personas. Fuentes.)
