To be fair, there is no "after Covid-19", just as there is no "after pneumonia" or "after malaria". Unless something remarkable happens, that virus strain will be a part of the annual flu season every year, just like the 30 other strains that we always generalize as "the flu". We have never singled one out before, but the Democrat needed a mass panic this year for political gain.
You’re correct. It will mutate and circle the globe forever.
To your list, add” “after polio”. There’s a vaccine. People get polio in the 21st century.