The two theses mentioned by Roberto Cicciomessere on the origins and causes of AIDS still coexist.
Factors of malnutrition and drug abuse are mentioned as factors which enable the manifest disease to develop in a faster and more effective way.
The question if the disease is caused only by the Hiv-virus, or if the latter is simply an aggravating factor, is the subject for different hypotheses over which experts are arguing, also and perhaps mainly because of the money which the discovery of the virus involves for the discoverer and the producers of AIDS tests.
One unquestionable fact is that the action of the virus alone does not explain why in certain individuals the course of the disease is very fast and in other individuals it is not (with the same virus)