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Non type B strain

Dec 6, 2002

What is non type b srain? Is this a common strain in US or other parts of the world? I have heard that this strain is not always picked up on viral load tests-is this true?

Response from Dr. Holodniy

HIV-1 exists as 3 major types M, O, and N. The M type comes in several varieties called subtypes or clades (A-J). Subtype B is the most common in the US. A and C are common in Africa, E in Asia. I will not comment on the performance of viral load assays in the diagnosis of HIV infection.

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