It very likely would prevent disease progression, stop the person from developing full-blown disease. The developed nations, the European nations and the U.S., have a healthcare system that insures access to the most potent drug regimens. In addition, there is an education system which informs patients or individuals at risk of infection of how to protect themselves, warns people of hazards of AIDS, unsafe sex practices. The blood donation programs of the Western nations use testing so they test for HIV in blood donations. As a result, people do not get infected through blood transfusion.
People know how to protect themselves using condoms.
People with HIV infection live longer. Their disease can be interrupted indefinitely if they take their medications. That's a very different story to what's happening in the developing nations. We both use accelerated approval programs to get new investigator drugs into clinical trials. Inc. The compound, I think, is known as T20.