of ecosystems to deliver services can be assessed by a variety of qualitative. and quantitative methods. An assessment of the condition of ecosystems, the provision of services, and. their relation to human well-being requires an integrated approach.
First proof of an human infected by HIV : 1959 Leopoldville, Congo. EVIDENCE FOR HUMAN INFECTION WITH AN HTLV III/LAV-LIKE VIRUS IN CENTRAL AFRICA, 1959 (Lancet-1986) (HTLVIII/LAV-like virus is the old name for HIV: HTLV-III) Genetic studies about HIV now estimates that HIV-1 appears on humans in Africa, probably few years before 1959.
The International Committee on the Taxonomy of Viruses chose the designation human immunodeficiency virus (HIV) in 1986. With the discovery by Montaignier's group in late 1986 of the related HIV-2 virus in West Africa, the original virus became HIV-1.