And he predicted that transitional fossils would be found. Boy howdy have they! Over 10 species of homids alone.
It also predicts how many species interact. Of course if you don’t believe in evolution you are free to disregard the advice of your physician, and only take the older medicines. After all, they worked before, and evolution would be necessary for new diseases to occur, or else the new diseases would be created by G-d... so it would be blasphemous to try to cure yourself of them...
Variation within species explains all that is needed for disease. Whether it's on the human end or the bacteria end. A minor change in some component of the species is not necessarily a whole new species. The human who is lactose intolerant is still human. That bacteria which can digest nylon is still a bacteria only with a different appetite.
Claiming that *new* strains of disease have *evolved* would also require knowing that that strain never existed before, as opposed to simply having been exposed.
At the rate that new plant and animal species are being discovered when they are much more accessible than bacteria, certainly makes it feasible that whatever causes these diseases has merely flown under the radar.
so it would be blasphemous to try to cure yourself of them...
Chapter and verse?
Why are one's decisions on health care related to one's view on whether the disease evolved or not?