EVERYDAY SCIENCE / “The media has brought forth a lot of compelling arguments regarding the near impossibility that an RNA COVID-19 vaccine might alter the genome or gene expression of our cells. However, I am still unsatisfied, because the case of DNA vaccines is almost never treated, even if they produce conditions a little more conducive to the integration of foreign DNA into our cells. So can this DNA integrate into our genome? If so, is it common and are there any risks associated with it?” asks Rachel Rioux, from Rivière-Ouelle.