![](https://webarchive.library.unt.edu/eot2008/20090508111214im_/http://www.actionbioscience.org/figures/holmesphoto2.jpg)
I think most emergent diseases are either newly described or increasing in their prevalence and range. The reason why we think that is most likely is that the RNA [ribonucleic acid] viruses1 evolve much faster than an antivirus. Essentially, an RNA virus will evolve in six logs faster than human DNA. And the more you evolve, the more you mutate, the more you are able to generate mutations that will adapt you to new environments like a new host species. And, ...
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