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A pathogen carried by rats and transferred to humans through fleas. After the plague can run its course 25 to 50 million people had died, which was about quarter of the Earth's population then.
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Formed dark swellings or buboes and the armpits and groin
this symptom led to the nickname Black Death. -
Impacted young adults the hardest half of those that died were between the ages of 20 and 40 and
99% were under the age of 65. -
It produces flu-like or cold-like symptoms, including fever, cough, dyspnea, myalgia, and fatigue. In severe cases it is characterized by producing pneumonia, acute respiratory distress syndrome, sepsis and septic shock that leads to about 3.75% of those infected to death according to the WHO.
