The rat is the germs to people, because it likes to live in the dirt, but we have avoided by cleaning houses and tanks early on a regular basis, it will cause the number of residents decreased.
Conduct the disease to humans. It's like being in the dirt. But we have to be avoided by cleaning houses and working as a regular tank. It will decrease the number of mice.
I'm a brought the disease to people. Because it's like in the dirty. But we have a way of avoid by cleaning the house, and the tank work regularly. Which makes the rats decreased.