İnsanlığın aşılar öncesindeki hayatta kalma başarısına karşılık, tarihteki büyük salgınlarda ölen milyonlarca insanın hatırlatılması.
Kaynak Observer Of Life
@zufrieden275
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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...)
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