Are cats evil beasts that should be killed to save mice?

[The Architect Of Fate]

I know that. My argument was if the contacts between rodents and humans are to be controlled for the sake of disease control, then the same goes even more for contacts between bats and humans. Rodents have caused zero pandemics in recent history, bats have caused three.

Bats, as far as I understand it, have a very different immune system from other mammals, because of having a very fast metabolism. In most mammals, the immune system is focused on eliminating the viruses from the body. In bats, the immune system is focused on making the virus coexist harmlessly with the body. Thus, the viruses can evolve in bats to be much more deadly and contagious than they can in other mammals, because strains that would immediately kill other mammals can spread between bats. It's like leaky vaccines such as for Marek's disease lead to more deadly and contagious strains: bat immune system acts as if it was vaccinated with a leaky vaccine. That's why many pandemics start with bats.

Just because it doesn't cause a pandemic doesn't mean you want it around.

And cats help against rodent-borne diseases... how exactly? If a cat eats an infected rodent, it becomes infected itself, right?

Nope,  most of the common bacterial infections cats are immune to and this can further be helped by vaccines and anti-parasite treatments.

Yet no human being is as blood-thirsty as a cat is. No human being would, if they sees a mouse, run after it and tear it apart using their teeth. And almost every cat would do that if it sees a mouse.

Humans are probably the cruelest most bloodthirsty creatures on this planet. Our capacity to inflict harm on our own kind and other species is without rival