Answer:
Flea bites.
Explanation:
Plague bacteria usually infects an individual by the bite of an infected flea.
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The plague was transmitted by fleas from infected rats. The rodents, present in commercial ships, spread through the territory until they reached the Byzantine army.
The Black Death, also known as the Bubonic Plague, is a disease of contagion by the secretion of another individual or contagion by the respiratory route, caused by the bacterium called Yersinia pestis, and is found in fleas that stay in contaminated rats.
With this information, we can conclude that the plague was transmitted by fleas from infected rats. The rodents, present in commercial ships, spread through the territory until they reached the Byzantine army.
Learn more about plague in brainly.com/question/22220550
