HIV/AIDS: the first 25 years--a view from Nairobi

Area of Science:

• * Virology and Epidemiology: Focuses on the zoonotic origins and global spread of Human Immunodeficiency Virus (HIV) types 1 and 2.
• * Immunology: Examines the three distinct phases of HIV infection and the immune response.
• * Public Health: Investigates the impact of interventions on HIV/AIDS epidemics.

Background:

• * HIV-1 and HIV-2 are zoonotic infections originating from primate hunting in West and equatorial Africa.
• * HIV-1 Type M pandemic emerged around 1930, with HIV-2 causing epidemics in West Africa.
• * HIV infection progresses through silent primary, long quiescent, and terminal AIDS phases.

Observation:

• * The silent HIV epidemic reached Nairobi around 1980, with a peak AIDS epidemic in 1992.
• * Highly active antiretroviral therapy (HAART) significantly improved individual patient outcomes.
• * Public education and increased condom use led to a progressive decline in new HIV infections.

Findings:

• * The worst of the HIV/AIDS epidemic may be over due to reduced incidence.
• * Modulating the immune response during the quiescent phase, potentially with steroids, may prolong it.
• * Steroids might also aid in managing critically ill AIDS patients.

Implications:

• * Future HIV management may involve immunological interventions to extend the quiescent phase.
• * Steroids show potential in treating severe AIDS cases and managing the quiescent phase.
• * Continued public education and vigilance regarding transmission routes can further contain the epidemic.