The Plague or Black Death was an epidemic disease that occured in the 6th, 14th, and 17th centuries that killed a total of 137 million people. At it's worst, during the middle ages, it killed 2 million people per year. From 1000 10 1360 the estimated european population was:
1000 38 million
1100 48 million
1200 59 million
1300 70 million
1347 75 million
1352 50 million
As you can see from 1347 to 1352 the population had decreased by 25 million people (one third of the population). All the people that died from the Plague were placed in empty houses, because there was not enough people left in the towns or villages to bury them.
The Plague was spread by flea infested rats. It was not the rat that passed or had the disease it was the fleas. The humans would end up with this disease when rats entered their houses and the and the fleas jumped off and then later jumped onto humans.
Once the flea was on the human, the flea would bite them and pass the Plague on. The fleas could be passed from rat to human, but not human to human.
Some sources say that the Black Death was named for the lumps that were found on the body, and others say that it is from the black rats that spread the disease. The scientific name was the Bubonic Plague named for the buboes (painful, tender,and enlarged lymph nodes) that formed on the body.
Symptoms of the Plague were black and purple spots all over the body usually starting under the arms and in the groin areas. The black lumps could get to be as big as an apple. From the time of infection to death was one week.
The Plague also spread...