Disability-adjusted life year for HIV and<unk>  per 100,000 inhabitants, 2002 The global pandemic of HIV/AIDS (human immunodeficiency virus infection and acquired immunodeficiency syndrome) began in 1981, and is an ongoing worldwide public health issue. According to the World Health Organization (WHO), as of 2021, HIV/AIDS has killed approximately 36.3 million people, and approximately 37.7 million people are infected with HIV globally. Of these 37.7 million people, 73% have access to antiretroviral treatment, and 16% do not know they were infected. There were about 770,000 deaths from HIV/AIDS in 2018, and 680,000 deaths in 2020. The 2015 Global Burden of Disease Study estimated that the global incidence of HIV infection peaked in 1997 at 3.3 million per year. Global incidence fell rapidly from 1997 to 2005, to about 2.6 million per year. Incidence of HIV has continued to fall, decreasing by 23% from 2010 to 2020, with progress dominated by decreases in eastern and southern Africa. , there are approximately 1.5 million new infections of HIV per year globally. Sub-Saharan Africa is the region most affected by HIV. In 2018, an estimated 61% of new HIV infections occurred in this region, and as of 2020, more than two thirds of those living with HIV are living in Africa. HIV rates have been decreasing in the region: From 2010 to 2020, new infections in eastern and southern Africa fell by 38%. Still, South Africa has the largest population of people with HIV of any country in the world, at 7.06 million, 19.1% of the population as of 2020. In western Europe and North America, most people with HIV are able to access treatment and live long and healthy lives. As of 2020, 88% of people living with HIV in this region know their HIV status, and 67% have suppressed viral loads. In 2019, approximately 1.2 million people in the United States had HIV; 13% did not realize that they were infected. In Canada as of 2016, there were about 63,110 cases of HIV. In 2020, 106,890 people were living with HIV in the UK and 614 died (99 of these from Covid-19 comorbidity).. In Australia, as of 2020, there were about 29,090 cases. Throughout the world, HIV disproportionately affects certain key populations (sex workers and their clients, men who have sex with men, people who inject drugs, and transgender people) and their sexual partners. These groups account for 65% of global HIV infections, and 93% of new infections outside of sub-Saharan Africa. In Western Europe and North America, men who have sex with men account for almost two thirds of new HIV infections. Due to gender inequality and gender-based violence, women are more affected than men. In Sub-Saharan Africa, 63% of new infections are women, with young women (aged 15 to 24 years) twice as likely as men of the same age to be living with HIV. HIV originated in nonhuman primates in Central Africa and jumped to humans several times in the late 19th or early 20th century. One reconstruction of its genetic history suggests that HIV-1 group M, the strain most responsible for the global epidemic may have originated in Kinshasa, the capital of the Democratic Republic of the Congo, around 1920.<unk>  was first recognized in 1981, in 1983 the HIV virus was discovered and identified as the cause of<unk> .
Epidemiology of HIV/AIDS
HIV disease progression rates
Epidemiology of cancer
Epidemiology of syphilis
Structure and genome of HIV
Epidemiology of diabetes
Epidemiology of bed bugs
Epidemiology of domestic violence