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 origin of AIDS has presented numerous puzzles to scientists since the first recognized cases appeared in the early 1980s. Until 1984 its cause was the subject of fierce debate.hey concluded that the origin of the HIV isolate discovered by Gallo was the same as that discovered by Montagnier. Today it is generally agreed that Montagnierâs group was the first to identify HIV, although Galloâs group insists it contributed significantly to demonstrating that it causes AIDS.