Also Aids resistance shown by descendents of black plague victims, and genetic factors that date back to the Neanderthal age that makes covid19 more dangerous to some humans than others. In a sense, diseases are smarter than us and our medical technology, and mutate to avoid destruction.
Carl ZimmerFor a disease as spectacularly scary as smallpox, its history is remarkably mysterious. Here is my look at what ancient DNA from the viruses is revealing. Gift link: nyti.ms/4vTU11D