But aren't measles, mumps, rubella, chicken pox naturally occuring viruses? Why didn't they mutate? Just trying to understand.
If you believe the Earth is 6000 yrs old and evolution is a myth, just give up on this topic. (that is not aimed at you personally... just a word to all readers)
The viruses you have just listed are 'newer' viruses in the evolutionary scheme of things. They are still dangerous.
Our species has been host to tens of thousands of viruses that have evolved with us over eons, and still exist, still infect us, are still very contagious, ... but have evolved long ago to not negatively affect the host in any way. Survival of the fittest works like that.
They do mutate within a pre-determined blueprint to which scientists do not understand.
(post is archived)