What do my cousin’s conflicting HIV test reports indicate?

Question
My cousin’s husband died of HIV infection four months back. When we got her tested with PCR test, it stated that she is HIV negative. But a few days after PCR test, VCTC Try dots test reported that she is HIV positive. We are utterly confused now. Is she infected with HIV or not?
Expert Answer
L
I am not surprised you are confused, these are rather confusing reports. However I think that keeping in mind that the husband was HIV+ and she has a positive report from two separate tests, I think it is safe to assume that she too is HIV infected. However I cannot explain whey the PCR test was negative.