There is something that we cannot deny and that is the fact that Darwinism is a huge part of the philosophy of the order. There are many reasons why we have kept germs active and powerful enough. This might sound terrible, but there is a lot of natural cleansing that germs provide to the world. Those who are extremely weak will fall behind while the strongest ones will survive the diseases and grow even stronger from it. This is the reason why we have allowed the germs to continue to evolve and adapt. They are actually a very useful and powerful way to get rid of the weakest animals, from all species.
use of germs for all kinds of cleansing of species has been around for a
long time now. We will continue to let this biological agents do their
work in order to preserve some control of the situations. Plus it amuses the order to watch people try to avoid them.