Fact Check: Can mRNA vaccines change the DNA?
There seems to be much confusion about this question, even though the answer is very simple. As well as providing the answer to the question, this video clarifies whether the PCR tests are measuring DNA, RNA or either.
We are not being told what is actually included in the vaccines, so we are guessing. I note that a further possibility is that "self replicating mRNA" has been used, to extend the duration of function of the vaccine