2 ms·
> In humans, viruses typically evolve to be less severe and more infectious over time. There isn't consensus in the scientific community about that. Counterex
by _whiteCaps_ 5y ago
> In humans, viruses typically evolve to be less severe and more infectious over time.
There isn't consensus in the scientific community about that.
Counterexamples: polio, rabies, avian flu in human hosts, Black Death.
It isn't clear what category COVID19 will end up in.