<50 vs. <75
Nov 30, 2003
I have been unable to speak to my immunology Dr. since my labs were posted. I noticed something different in the viral load reporting. In the past, an undetectable viral load was represented by <50. My recent results came back showing copies/ml <75. Has the standard change as to the way readings are calculated. My primary care physician said the lab must be using a new method. I am confused. I would assume that my viral load is still considered undetectable. Can you provide an explanation?
Response from Dr. Holodniy
Could be a new or different assay. In an HIV infected person, undetectable means cannot be detected above the threshold of the assay (50, 75, 200, or 400 copies, etc). It does not necessarily mean zero.
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