It just was that there were so many rats that they were associated with the disease. Human scientific medical research would halt if not for the rat. Without rats, medical research wouldn't have any test subjects, and the release of new medicine would be dismateled. The rat is very similar to ourselves in anatomy and dirt. In this short essay, I hope to have banished some of your dark thoughts about rats.
Rats are useful.
Rats do make good pets. Rats rarely bite. Rats, not dogs, should be mans best friend. The are sacrificed by the millions for our medicine and safety. Long live the rats.