Activists express outrage after many African delegates were denied entry and could not attend the international HIV conference.
Scientist Catherine Kibirige's new assay test will help the most in need in Africa, as well as aid in HIV research.
Elite controllers are people with HIV antibodies, but whose viral loads remain low.
Katzenstein was one of the first American doctors to focus his efforts on saving HIV-positive Africans.
Taking six shots a year, as opposed to 365 pills, yielded huge advantages among women in a recent trial.
Nations that don't penalize same-sex activity have lower rates of HIV among men who have sex with men.
The finding is further proof HIV crossed over to humans decades before it turned into a pandemic.