> viruses are made of RNA Depending on the species, a virus can contain either DNA or RNA as its genetic material. Check out the Baltimore classification (http

> viruses are made of RNA Depending on the species, a virus can contain either DNA or RNA as its genetic material. Check out the Baltimore classification (https://en.wikipedia.org/wiki/Baltimore_classification https://en.wikipedia.org/wiki/Baltimore_classification) for more info. > So there is research suggesting that viruses are actually a source of genetic material for humans. They are! Endogenous retroviruses and the syncytin protein (involved in placental development) are some known examples.