[angelzen]

The vaccine is not the virus. If you take a stochastical approach to understanding immunity, that raises questions whether one can be substituted for the other in the long term. Derek Lowe has a good elementary introduction in the subject.

"It's important to realize, though, that all immune responses to a viral infection generate a mixture of neutralizing and non-neutralizing antibodies. That's one of the things about the immune system - it revs up production of a wide variety of antibodies, selected from the untold billions of them circulating around in your bloodstream. Some of them bind to one part of the pathogen, and some to another. And they bind in different conformations, sticking to different parts of the surface of the invading virus from different directions."

https://www.science.org/content/blog-post/antibody-dependent...