evidence: Ladapo’s statement did not include any evidence that COVID-19 vaccines have caused "DNA integration," in which DNA fragments in the vaccines combine with a recipient’s DNA. [...] Offit told PolitiFact the discussion of "DNA contaminants" in the COVID-19 vaccines is really one about "utterly harmless manufacturing residuals." Plus, he said people are exposed to foreign DNA all the time, including when they eat animal or plant products.