Karius uses DNA sequencing of everything that's contained in a sample to detect all bacteria and DNA-viruses in the sample. Given the way that costs of sequencing are falling this approach seems to be the future of detecting bacteria based infections.
It would be great if the same approach would also work for RNA-based viruses. For it to work it would of course be necessary that there's enough RNA of the virus in comparison to the other RNA.
How much virus RNA is there in a person who's infected by an RNA virus in comparison to the other RNA?