The DISEASE THAT KILLED MOST.
Its estimated that the bubonic plague killed every 6 out of 10 Londoners. The people of Europe did not know that it was the result of a microscopic bacillus bacteria . This organism was not new to the world in the fourteenth century, it had existed for millions of years prior. Europe actually had already felt a blow from the same plague earlier in the 6th century. Rodents are likely to infection from the bacteria. These rats are also host to fleas, which live off of the blood of other animals. The flea is not affected by the bacteria, yet still carries it in the blood extracted from the rat. The flea's ability to carry the disease without death makes it a perfect transfer from organism to organism. When these rats inhabit urban areas or boats in order to live off of stored food supplies, they bring the fleas with them. Fleas leave the rat, which also dies shortly from the disease, and moves on to a new host; humans. After the fleas pass on the diseases to the humans, the side affects , such as A high fever, aching limbs, fatigue, vomit blood and in some instances suffer hysteria from fever and terror; began to kill the victims.