If you are knowledgeable about how vaccines work in general and have some understanding of the mRNA shots work, I think you see the "acute" reactions as a warm-up to the "big show".
Dr. TenPenny has explained the limitations of the antibodies produced by the vaccines. There are a number of mechanisms depending upon the vaccine type.
Some subjects you can look into to inform yourself include "anti-body dependent enhancement", linked-epitope supression (I believe that is also called "original anitgenic sin"). Dr. Bossche has called out "immune escape" in which mass vaccination drives evolution of the virus.