IMO:
The gene therapy shots are designed to marinate your organs/fluids, so they can be trafficked more efficiently. Especially fetuses, which are worth the most. It mutates your DNA and forces your body to grow pockets of stem cells that will be worth millions (as if they care about money), once you are dead and they extract them out.
Also, certain batches of mrna vaccines target certain organs, making them able to be transplant without rejection or pills, etc. Elite stake holders have shares on the different organs/cell batches, and many of them have multiple transplants lined up, most of whom are still living, not knowing some one else owns their heart cells, and that they will die mysteriously (coincidentally the same time their fresh new parts are needed)
They've completely mapped out the genetics of us farm humans, and know which donors are compatible with who.