Given the world’s population in 1918 of approximately 1.8 billion, the upper estimate would mean that in two years—and with most of the deaths coming in a horrendous twelve weeks in the fall of 1918—in excess of 5 percent of the people in the world died. Today’s world population is 6.3 billion. To give a sense of the impact in today’s world of the 1918 pandemic, one has to adjust for population. If one uses the lowest estimate of deaths—the 21 million figure—that means a comparable figure today would be 73 million dead. The higher estimates translate into between 175 and 350 million dead.
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