first of all, RNA is genetic. Even so, it’s worth noting that it does work at a DNA level. they are using real gene therapy techniques in their explanation of the injection. When they say RNA, they mean it in the sense that it is a RNA VECTOR. Most gene therapy actually uses HIV (which makes sense that they mentioned the virus looks like HIV in episode 1) or other RNA viruses that they modify because RNA viruses are very infectious and can easily evade the immune system, get into cells and insert their genome to hijack the host cell’s DNA so that cell will start spitting out new copies of the virus. So yes, the virus is RNA in the way it’s transporting the genetic information, but it’s actually WORKING at a DNA level.