Why is it important to limit the numbers of mice, rats and other murine rodents?

To answer this question, you need to recall the historical example when the number of mice and rats played an important role in the history of all mankind. These are the times of the Middle Ages, when millions of people died from the plague. The carriers and disseminators of the plague were not the rodents themselves, but the parasites on their skin. The numbers of mice and rats were huge in cities, so the epidemic spread very quickly. The situation was aggravated by the fact that cats were considered to be the spread of the plague. They were killed and the number of rodents only grew.