> Viruses evolve to become more mild because very sick or dead hosts are bad spreaders. This need not be true. There are many ways a virus could spread more wh

> Viruses evolve to become more mild because very sick or dead hosts are bad spreaders. This need not be true. There are many ways a virus could spread more while simultaneously making people sicker and causing more death. For example, a strain evolving to cause people to be contagious and spread for twice as long as now and then killing everyone could very well spread more than it does now.