A mutating virus... is still a virus

I had a conversation with an atheist the other day. We were talking about evolution and I asked him for proof. He asked if I've ever gone to the doctor and taken the antibiotics prescribed to me. I answered that I have, of course. God has graciously imparted his knowledge to doctors.

The atheist then said that the antibiotics I took is the basis of evolution; meaning that a virus is constantly mutating and new antibiotics are needed to help cure the person. His proof of evolution was the evolving virus.

Maybe it was me, but when a virus mutates, what does it mutate into? I see different breeds of dogs who have mated to form different breeds. But have two dogs ever mated to form anything else but a dog? A dog is a dog.

A virus is reproduces rather quickly and mutates quickly as well. At this rate, one would think that if it were to evolve into anything more complex, it would have by know. Yet, after all this time, the virus today is still a virus just as when the first virus appeared on the Earth.

The antibiotics are created by the scientist. Thank God for scientists.