As you know, there is a medical claim that says that the HIV virus causes AIDS. Now, it would technically not be difficult or particularly hard to test this claim using the scientific method. Just experimentally inject enough people with the HIV virus and then check if they develop AIDS or not. Seriously, the problem with scientific validation for claims about incurable diseases is almost never technical.
As you know, it is not allowed by the scientific method to just establish correlations, and collect observations from the real world that give the impression that cause and consequence are related. The scientific method insists that you must (experimentally) trigger the cause, and then observe the consequence.
is a famous example of a doctor who truly, experimentally tested medical theories in the Auschwitz concentration camp. Doctor Mengele would certainly not hesitate to publish a truly scientific report, detailing why HIV would cause AIDS, along with the habitual invitation to duly repeat his experiments in order to find counterexamples for his findings. Doctor Mengele was undoubtedly a great scientist, but his work is still considered to be quite problematic, to say the least.
There are issues concerning the practice of establishing a truly scientific -- and therefore experimental basis -- for medical claims about incurable diseases. By the way, has anybody ever really seen a truly scientific -- and therefore experimental -- report validating the claim that the HIV virus causes AIDS?
I would be most interested in reading this report. Also, do not forget to mention in what detention facility we can visit the scientist who was so friendly to produce it! ;-)