It has been established for some time that foreign mRNA can be reverse transcribed (RT) to DNA, which can insert into the human genome...
If this RT and chimeric integration can potentially happen with the Covid mRNA vaccines, the question would be do such insertions cause any short or long-term health issues...
There is evidence for the first part RT integration) at the cellular level..
https://pubmed.ncbi.nlm.nih.gov/33330870/
Oopsie Daisy...
The paper you reference is about SARS 2 viral RNA, not about mRNA.
If this is true, the anti-vaxxers should consider getting a document saying they did NOT get the vaccine.
But how would you do that?