Fact-check of the claim that mRNA vaccines integrate into or permanently alter human DNA.
"mRNA vaccines enter the cell nucleus and permanently alter human DNA. The mRNA is integrated into the genome, changing our genetic code."
1. mRNA cannot enter the nucleus: mRNA vaccines are designed to remain in the cytoplasm. They cannot cross the nuclear membrane. There is no mechanism for mRNA to enter the nucleus.
2. No reverse transcriptase: Human cells do not contain the enzyme reverse transcriptase (except in retroviruses) that would be needed to convert RNA to DNA and integrate it into the genome.
3. mRNA degrades: mRNA from vaccines is transient. It degrades within days after vaccination. The spike protein production stops.
4. FDA review: FDA analyzed the possibility of integration and found no evidence that mRNA vaccines alter DNA.
Confidence Level: HIGH