A Brief History and Global Overview of the HIV Pandemic

• First cases of AIDS were reported in 1981, and HIV was identified as the etiologic agent in 1983.^{[CDC 1981; Barré-Sinoussi 1983; Gallo 1984]}
• UNAIDS estimated 37.7 million people were living with HIV worldwide in 2020 (Figure 1), including 1.7 million children younger than 15 years^{[UNAIDS 2021]}
• Approximately two thirds of all people with HIV live in sub-Saharan Africa,^{[UNAIDS 2021]} but new infections have decreased there by 38% since 2010[...

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