
The Black Death

the plague was not a contageouse decease it was caused by fleas
1.)the fleas bit rats which carry the decease
2.)The fleas bit the human and passed the pathogen

I don't know about the states but I'm pretty sure everyone in Europe with a bit of common sense knows what the Bubonic Plague was. It wiped out a 3rd of the population.
In the early 1330s an outbreak of deadly bubonic plague occurred in China. The bubonic plague mainly affects rodents, but fleas can transmit the disease to people. Once people are infected, they infect others very rapidly. Plague causes fever and a painful swelling of the lymph glands called buboes, which is how it gets its name. The disease also causes spots on the skin that are red at first and then turn black.