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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. [4] [5] [6] According to the World Health Organization (WHO), by 2023, HIV/AIDS had killed approximately 40.4 million people, and approximately 39 million people were ...
The HIV pandemic is most severe in Southern Africa. Over 10% of all people infected with HIV/AIDS reside within the region. Adult HIV prevalence exceeds 15% in Eswatini, Botswana, Lesotho and Zimbabwe, while an additional six countries report adult HIV prevalence of at least 10%.
As of 2018, about 700,000 people have died of HIV/AIDS in the United States since the beginning of the HIV/AIDS epidemic, and nearly 13,000 people with AIDS in the United States die each year. [7] With improved treatments and better prophylaxis against opportunistic infections, death rates have significantly declined. [8]
Scanning electron micrograph of HIV-1, colored green, budding from a cultured lymphocyte. HIV is the cause of the spectrum of disease known as HIV/AIDS. HIV is a retrovirus that primarily infects components of the human immune system such as CD4 + T cells, macrophages and dendritic cells. It directly and indirectly destroys CD4 + T cells.
People under 15 years of age made up over a quarter of the world population (25.18%), and people age 65 and over made up nearly ten percent (9.69%) in 2021. The world population more than tripled during the 20th century from about 1.65 billion in 1900 to 5.97 billion in 1999.
Top causes of death, according to the World Health Organization report for the calendar year 2001: [6] Causes of death in developing countries. Number of deaths. Causes of death in developed countries. Number of deaths. HIV-AIDS. 2,678,000. Ischaemic heart disease. 3,512,000.
The Bamba people of Uganda, located in the southwest of the country, carry 45% of the gene which is the highest trait frequency recorded in the world. [180] The Sickle Cell Clinic in Mulago is only one sickle cell disease clinic in the country and on average sees 200 patients a day.
List of countries by population (United Nations) This is a list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects. It presents population estimates from 1950 to the present. [2]