I think we need to psychologically prepare to lose about 1/2 the population of earth to Covid within 10 to 30 years given all present variables

 Why?

The writing appears to be on the wall at this point. If you can ONLY vaccinate about half of the population of earth (because that is what is happening here in the U.S.) then is seems logical to assume that you might lose eventually most unvaccinated people on earth to one of the variants within 10 to 30 years.

You have to combine the laws of probability with logic and reason.

Of course something else might happen. But, if you take all present variables this is where the human race is presently headed.

Natural Selection is taking out people either because they didn't get vaccinated or because there are no vaccines for them.

So, the logical progression is most of those not vaccinated eventually will be taken out by worse and worse variants caused by non-vaccination worldwide. (for whatever the reason).

So, even if we vaccinated EVERY man, woman and child in Europe and the U.S. it wouldn't be enough to stop all variants starting in countries where there are no or very little vaccinations.

So, logically I presently believe 1/2 of the population of earth likely will be gone within 10 to 30 years time from getting covid-19 or one of it's variants or from future Covid(20)(21)(22)(23)(24)(25?) etc.

Of course something unknown and unexpected could happen too.

But, given all present variables this is logically what is coming for the human race on earth.