The mRNA vaccines use cell machinery to produce spike proteins which are then presented on the cell surface via the Major Histocompatibility Complex. Antibodies which detect the foreign proteins on the cell-surface are then used to produce additional antibodies against the viral proteins. However, after the antibodies have cleared the virus from the extracellular domain, it still remains that the cells which the mRNA vaccines used to present the spike proteins to the immune system are still presenting themselves as infected. The consequence is the mRNA vaccines will cause your immune system to kill all the cells which uptake the mRNA vaccines.