Black Death More Condition_symptoms How Are The Black Death And The Bubonic Plague Two Different Things?

How are the Black Death and the Bubonic Plague two different things? - black death more condition_symptoms

How should the history of the BA, you know, but I keep getting the confused. I know that the medical point of view, these two things are different.

As the Black Death and plague are two different things? I know that the bubonic plague is the result of the transfer of Yersinia pestis "the known world at that time (at least).

Please enlighten me on this point.