If the clinician did not aspirate the needle properly, the pressure pushed the mRNA into the blood stream, where it would travel to organs, then cause the organs and blood vessels to produce spike proteins...although with nanotechnology, I believe all jab poisons travel around the body freely eventually.

Also, there were three versions of mRNA. Some would produce spike proteins more agressively.

The preservative concentration varied the amount of damage to red blood cells, too.