They really didn't know what caused it at first then they found out it was the rats.
Another Answer:
It has been said to be many things that caused the black plague.
One theory was that the Jews who traveled from place to place brought it with them but they had built up an immunity to it.
Another theory is that the rats that came in on ships and such brought it and it easily spread to people.
Yet another theory is that the cats that ate the mice that had the plague came into people's homes as helpers and spread the disease.
the people thought the cause of the black plague was a witches curse.
keep away from bad smells
The plague and it helps with HIV not turning into aids for children of people who survived the plague.
because the black population is taking over they r the new white
the black plague was a crisis because it killed lots of people
The black plague occured in Europe from 1347-1351. It killed about 25 million people.
people
rats died out and people survived plague and became immune to it.
Because they weren't in contact with other people who had the Black Plague, so they weren't infected.
The Black Plague was an epidemic brought to Europe by trading ships from the eastern Mediterrenean. Itr is thought by many to have been bubonic plague, but others think another disease was responsible The people who got the black plague became covered in "Buboes", or blister like objects filled with macrophages, or immunity cells. It was mostly spread by rat fleas. The Black Plague was called as it is because of internal bleeding, one of the symptoms, and the blood drying and giving the skin a "black" or deep,dark red color.
the black plague hope this helps:}i think this is the answer.
It is called blackheath because all the people that died from the plague or black death were buried under there. Some people say that if you dig up blackheath the plague will come back!!!!!!!!!!!!!! (I don't think that's true but you could give it a try!)