What has alarmed me the most. Is that no HIV AIDS test is 100% conclusive.
I've watched laboratory expert say the HIV test is absolutely not fail proof.
Even have watched them say that its not even close to being 100% accurate
I've watched a whole documentary and from what I could understand.
There is no world standard test.
Even the most expensive test, can flip flop giving out positive and negative results
with the same patient testing more then one time.
There are false positives and false negatives for many diagnostic tests, not just for HIV. Falling CD4 levels in the blood is a good indication.
It's not just a problem for HIV. In my industry, the farmers and natural resource people are crying for better tests against a bacteria that can decimate fish stocks. It's called
Renibacterium salmonarum, and it causes a disease called bacterial kidney disease. Standard tests like cell culture can take many weeks, as the bacteria is very slow to culture.
There's been a lot of work put into ring testing the various methods of detecting the bacteria. Ring testing just means that many different labs test the procedures, to develop robust procedures. The problem is that some tests may be better for specificity but not for sensitivity. So the procedures have situations where some are more optimal than others.
That's just reality. It's not often that we can have a perfect test that produces perfect results, at least not for biological systems.