6. what is the one medical advance that is associated with the black death in europe in the late 1300's?

The medical advance that is associated with the black death in Europe in the late 1300’s is "The Incubation Period".

The term is applied to the time period when someone receives an infection and is extended to the time of the onset of the clinical disease. The period in between the reception and onset of disease is "The Incubation Period".