The only way to completely eradicate a virus like CoVid19 is to eliminate all human carriers. That's not going to happen.
This virus is here to stay, just like the flu, small pox, etc. Small pox is unfortunately not entirely eradicated (they recently found it in soil that is defrosting as the planet warms up - so small pox vaccination may be a thing that some of you see within your lifetime).
We can only hope to get it to be at very low rates while we develop a vaccine. Since now we have fairly large numbers of anti-vaxxers, CoVid19 will likely always have a home. It's super important that the vaccine be effective in older populations if we wish to keep current life expectancy where it is. Next year, we'll see some changes in global LE (obviously, it will go down).
I do think that within a year or two there will be major breakthroughs in viable treatments that work for people who very ill with CV. The fact that no one can tell (without a test) whether they have one of many flus, common colds - or CoVid19 - will remain a problem.
I keep thinking about this. For the rest of my life, this virus is out there. Even if we all make it through this crisis of herd immunity, if it's like other CoVid viruses, many of us will lose our initial immunity, if we ever get it, after 2-3 years. A vaccine is a necessity. I'm glad to hear from scientists that they are optimistic, but until we actually get such a vaccine, it's a gloomy picture for older people.
All the travel plans my DH and I had for our golden years are on hold, indefinitely, perhaps forever.