Observer Of Life @zufrieden275 Follow How did the human race survive for thousands of years without vaccines? Readers added context they

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Observer Of Life @zufrieden275 Follow How did the human race survive for thousands of years without vaccines? Readers added context they thought people might want to know Around 25 to 50 million people died from the black death between 1347 and 1351. (en.wikipedia.org/ wiki/Black Dea...) and around 17 to 50 million died from the spanish flu between 1918 and 1920 (en.wikipedia.org/wiki/ Spanish_f...) Do you find this helpful? Rate it


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