If you're referring to mRNA vaccines, one of us needs to brush up on basic cellular biology. If you're referring to Adenovirus vector COVID-19 vaccines, I beli

If you're referring to mRNA vaccines, one of us needs to brush up on basic cellular biology. If you're referring to Adenovirus vector COVID-19 vaccines, I believe episomal replication makes their DNA short-lived in the host. Also, as it's never reverse-transcribed into the human genome, there's a semantic argument that the Adenovirus DNA is never a part of the person's DNA, even when it is short-term resident in the nucleus. Though, I suppose there might be some rare form of translocation that might still result in Adenovirus DNA being incorporated into the Human genome. I don't know enough about viral genetics to know the corner-case caveats associated with the claims that Adenovirus vector vaccines don't modify human DNA.