Now that it seems fairly certain that two vaccines will receive EUAs in December, we have to turn our attention to just how long will any immunity thus obtained last? Will people need boosters every few months or every few years? Or never?

One article I found on the subject is
https://www.healthline.com/health-news/how-long-does-immunity-last-after-covid-19-what-we-know

I have not been able to find any studies comparing the antibodies (type and quantity) produced by vaccines against those produced in recovered patients. However, one would expect them to be similar.

Also, just because antibodies are not present in a person one year after a vaccination or an episode with the disease, it is possible that the body remembers what to do in the event of a new attack.

Since we have physicians and other extremely qualified jellies, perhaps we can pool our resources to come up with a satisfactory answer.