I'm pretty sure that if the virus and its DNA are undetectable then you can't spread it. I believe that's how it works with HIV anyway.
> if the virus and its DNA are undetectable then you can't spread it
The devil may be in the details. E.g. if a COVID test shows negative, it doesn't mean that you can't spread it. This is partly because different tests have different sensitivities.
> I'm pretty sure
FYI, without citations, it is hard to distinguish credible experts vs people on the internet saying "trust me bro".
Ahh, the classic corona fallacy. If you have something, X, which you cannot detect. Then you can count it as zero, since all you can do, is speculation not backed by any empirical evidence. If there is something you can detect and measure, then, we can start the great a mighty process of science.