Why would someone hv undetectable viral load in semen but not in blood or vice versa? how could hiv antibody test take up this

Discuss with MD: Goals are undetectable virus load in blood and CD4 count over 500. Antibody testing won't differentiate; it shows past exposure.

Body fluids carry it: HIV can be found in blood, semen, pre-ejaculate, vaginal fluid, and in breast milk. Typically, it is not found in other fluids such as tears, mucus, urine, sweat, saliva unless there is blood present in them. If there is detectable virus in the blood, there is contagiousness. Semen viral loads should not be used to gauge contagiousness.