Plague - The Black Death was born from an evolution of the bacterium Yersinia Pestis.it is the most devastating pandemic in the history of humanity, which affected the whole of Europe killing 60% of Europeans, died 50 million people of a total of 80 million inhabitants.A plague doctor was a medical physician who treated victims of the plague.The protective suit consisted of a heavy, waxed fabric overcoat, a mask with glass eye openings and a beak shaped nose, typically stuffed with herbs, straw, and spices. Plague doctors would also commonly carry a cane to examine patients without the need to make direct contact with them. The masks were designed to protect them from putrid air, which was seen as the cause of infection.