Sir, In hiv elisa test if the value <1 means 0.4 ,0.03 or 0.5 then it considered as negative but in hiv pcr dna or hiv pcr rna if the viral load value <40 some says it's negative and some says if a person is hiv negative then the viral load equal to zero and must be zero. Then what is the correct value for a hiv negative person it's 0 or<40. I want to ask the doctors who went through such patients hiv pcr test reports, what was that values and what value they consider for a negative result.

Dr. Sajeev KumarGeneral Physician32yrs exp

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A viral load test measures how much human immunodeficiency virus (HIV) is in the blood. The results can take up to 2 weeks. The normal values listed here-called a reference range-are just a guide. These ranges vary from lab to lab and depend upon which testing method is used (RT-PCR, bDNA, NASBA) It measures the number of HIV virus particles in a milliliter of your blood. Those particles are also known as ?copies.? A low viral load is a sign of the virus copying itself in low amounts in the body. According to AIDS. Gov, HIV viral load is typically undetectable below levels of 40?75 copies/mL.  

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