Spanish flu 1918 (1 ene 1918 año – 1 jul 1919 año)

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The 1918 flu pandemic (January 1918 – December 1920) or spanish flu pandemic was an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus. It infected 500 million people around the world, including people on remote Pacific islands and in the Arctic, and resulted in the deaths of 50 to 100 million (three to five percent of the world's population), making it one of the deadliest natural disasters in human history.

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