RNA mutates easily. Making viruses change constantly.
The thing is, a virus that mutates to be more deadly spreads less and burns out. Through natural selection the weaker viruses survive. The more mild the symptoms, the more it will spread. The more severe, the less it'll spread because people will stay home sick.
The variant issue is not their existence, we've always known that viruses mutate. The issue is that basic science taught in high school tells us about how the mutations work as described above.
There are variants.
RNA mutates easily. Making viruses change constantly.
The thing is, a virus that mutates to be more deadly spreads less and burns out. Through natural selection the weaker viruses survive. The more mild the symptoms, the more it will spread. The more severe, the less it'll spread because people will stay home sick.
The variant issue is not their existence, we've always known that viruses mutate. The issue is that basic science taught in high school tells us about how the mutations work as described above.