The black death was a bacterial infection so had a much lower rate of mutation. It's still with us today and is still deadly (Mortality 11%), difference is now we have antibiotics and less fleas as vectors of transmission.Son of Mathonwy wrote:The virus "wants" to infect as many as possible but it doesn't make too much difference to it whether the host lives or dies at the end of the process. In the long term there would be a small adaptive advantage to leaving the host alive (because it could be a host again in the future), but that would be a small advantage compared with the ability of the virus to replicate fast enough (which is by definition harmful to the host) to remain ahead of the host's immune response.Stom wrote:morepork wrote:
It will keep mutating for as long as it is able to replicate in millions of people. It won't stay less serious for long.
Why? Doesn't the virus want to infect as many as possible but not kill them all? How do other pandemics fizzle out if they just mutate stronger again?z
I'm not sure all pandemics do fizzle out in the way you suggest ... the black death was with us for centuries, still just as deadly. I think it was more a case of humanity evolving to resist the plague, rather than the plague evolving to be less deadly.
Regarding the seriousness potential future COVID mutations, it appears from my reading that the jury is still well and truly out. There's world renowned virologists and epidemiologists arguing both sides of the argument. We simply do not know enough about viral evolution to understand either way (e.g. there is still no commonly agreed explanation for why Spanish Flu pandemic ended, or if it even has ended!).
What we do in light of that uncertainty is the issue. If there was a even a 1% chance of COVID having Omicron's transmission rate but a mortality rate of 10%, then I think you could make a good case that we should be moving heaven and earth to reduce the chance of further mutations.