The 1918 pandemic did its worst after the first human death between week 16 and week 26 after the second wave and where the virus had mutated into the deadly human-to-human mass killer.

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The sharp polarization, combined with fear, between left and right that was a legacy of the fascist period of Mussolini from 1917 to 1943, returned first in the form of a huge wave of strikes in the late 1960s and early 1970s, and then in a deadly form of political violence.

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