UND at week 4

Today I got the test result and my VL is Undetectable and detection level is 25.
Yay, that's what I wanna hear.
I think that my next test should be qualitative to see if there's any viruses hiding here or there.
I've read that qualitative test can tell me if there's any viruses and it's more sensitive than quantitative, the first one can detect even a single virus.