How can a persons HIV Antibodies Index Value be at 1.62 and the Western Blot be negative? Isthe perso infected

Answer 1

I don't know what reference values the lab was using, but 1.62 sees quite low anyway. If the EIA is low and the Blot is negative, then chances are, the low reading on the EIA is from cross-reactivity from some other source. Many lab tests give false positivies in the presence of other factors, which is why a confirmatory test is necessary.

In short: I think the person is negative, but s/he might wanna go test again in 3 months. Always play safely, and good luck.