17 dic 1920 año - 1918 Influenza outbreak (copy)
Descripción:
an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus. ... Scientists offer several possible explanations for the high mortality rate of the 1918 influenza pandemic.
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fecha:
17 dic 1920 año
Ahora mismo
~ 104 years ago
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