One you DNA is changed, it doesn’t get eaten by your system. The efficacy protecting a person from covid is pretty much nil. That is why they intend to keep shooting people up with continual boosters, which is what they want you to think.
The real reason is demonic.
You’ve got the spike protein introduced into your system and your immune system adapts to recognize this new invader, but if you don’t get any further exposure in a timely fashion, your immune system is going to move on and your body will eat the remaining debris and turn it into waste or energy.