Today, scientists understand that the Black Death, now known as the plague, is spread by a bacillus called Yersina pestis.They know that the bacillus travels from person to person pneumonically, or through the air, as well as through the bite of infected fleas and rats. Both of these could be found almost everywhere in Europe, but they were usually on ships which is how it made its way through one European port city after another.
Because they did not understand the biology of the disease, many people believed that the Black Death was a kind of punishment for there sins against god, some people even tried to make right by killing off sinners, especially Jews
Bubonic Plague, Pneumonic Plague. At the time it was called the 'great plague' or the 'great pestilence' were all names used. But The term 'Black Death' was actually NOT used at the time
Doctors would often wear masks that resembled birds when they visited a patient, they would fill it with rose petals and tea bags so that they would be breathing in fresh air