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Please help!!Test result confusion

Hello Everybody
I’ve a Doubt In Hiv-1 rna pcr quantitative test.The limit of detection for the test is “20copies/ml”
But in the RESULT INTERPRETATION  there is an comment like
* below 20copies/ml- HIV-1RNA Detected, less than 20 HIV RNA copies/ml


My question
•In the test it is mentioned that the limit of detection is “20copies/ml” but what does it mean that by giving such sentence in result interpretation which I have mentioned above?If the test’s limit of detection is “20copies/ml”how it can detect viral copies less than 20 copies/ml and mention it as that.?

Totally confused Please do help

Thanks In Advance
1 Responses
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20620809 tn?1504362969
What was your risk?  That's what we start with here.
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