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 United States was the epicenter of the AIDS epidemic of the 1980s, first noticed by doctors in young gay men in Los Angeles, New York City, and San Francisco in 1981. In the United States, 1.2 million people live with HIV, about 1/8th of whom are unaware of their infection.