As a virus mutates, it becomes more contagious and less lethal. And then eventually it mostly disappears. Many voices claim that Delta will be with us for a very long time, but we should be so lucky. It's way more likely that it will soon be followed by a next variant that will in turn become dominant. And more contagious and less lethal.

And no, that's not because of unvaccinated people, or at least there's no logic in that. If most people are not vaccinated, the virus has no reason to mutate. If many people are, it does. So this CNN piece is suspect. Vaccinated people are potential variant factories, just as much, if and when the vaccines used don't stop them from being infectious, as the present vaccines don't, far as we know.

Unvaccinated People Are "Variant Factories," Infectious Diseases Expert

Unvaccinated people do more than merely risk their own health. They're also a risk to everyone if they become infected with coronavirus, infectious disease specialists say. That's because the only source of new coronavirus variants is the body of an infected person. "Unvaccinated people are potential variant factories," Dr. William Schaffner, a professor in the Division of Infectious Diseases at Vanderbilt University Medical Center, told CNN Friday. "The more unvaccinated people there are, the more opportunities for the virus to multiply," Schaffner, a professor in the Division of Infectious Diseases at Vanderbilt University Medical Center, said. "When it does, it mutates, and it could throw off a variant mutation that is even more serious down the road."