I can see why they might try and get our own bodies to make the active component of the vaccine but I think the problem is that mRNA has no off-switch.
Consequently, when we have been programmed to make the spike protein, which is toxic, we just keep making it.
With a true vaccine, when the injected active component has been defeated by the body's immune system it is effectively switched off.
Bingo
Natural immunity is cumulative. mRNA is highly selective and overloads the immune system to do only one thing
I can see why they might try and get our own bodies to make the active component of the vaccine but I think the problem is that mRNA has no off-switch.
Consequently, when we have been programmed to make the spike protein, which is toxic, we just keep making it.
With a true vaccine, when the injected active component has been defeated by the body's immune system it is effectively switched off.
There are more components in natural immunity than just reacting to the spike protein.