One of the first studies to mention the potential issues with the wild spike and the vaccine spike.

https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC8538446/?fbclid=IwAR3IbDVjISTbzIzrzx4C3ON6uMKiYX7WqwAb4S57nCFvJaOM0uTMG0vD7VU