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what is undetectible?

Dec 21, 2003

I have a friend that is HIV+, he started taking meds and has been told that his viral load is undetectible now. What exactly does that mean? Also, at what point does HIV switch to AIDS?

Response from Dr. Holodniy

Undetectable in terms of blood viral load measurement means < 50 copies/ml of blood. AIDS by definition is a CD4 count < 200, or development of any one of a number of infections or malignancies.

low cd4
CD4 count

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