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The bacterium responsible has been identified as Sania Pestis, commonly known as Bubonic Plague, a pathogen carried by rats.
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In Sicily, ships returned to the shores filled with sailors stricken by a mysterious illnes that forms dark swellings in the armpits. The Black Death took up to 200 million lives across Eurasia.
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Infected 500 million worldwide. Spanish flu impacted young adults the hardest; half of those that died were between the ages 20 and 40
