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Globally, some 35.3 million are living with HIV/AIDS, World Health Organization (WHO), an estimated 36 million people have died since the first cases were reported in 1981 and 1.6 million people died of HIV/AIDS in 2012. [1] Using WHO statistics, in 2012 the number of people living with HIV was growing at a faster rate (1.98%) than worldwide ...
[2] [5] While South Africa's large population of HIV-positive people is attributable to its high disease prevalence (17.3%, one of the highest in the world), Nigeria's is lower at 1.3%. [1] However, countries such as Nigeria with high HIV rates above 1% are classified as having Generalized HIV Epidemics (GHEs) by UNAIDS. [6]
The African Region accounts for two thirds of the incidence of HIV around the world. [10] Sub-Saharan Africa is the region most affected by HIV. As of 2020, more than two thirds of those living with HIV are living in Africa. [4] HIV rates have been decreasing in the region: From 2010 to 2020, new infections in eastern and southern Africa fell ...
The Center for Prevention Services was formed in 1980 as one of the original five CDC centers, at the same time CDC's name changed from the singular "Center for Disease Control" to plural "Centers for Disease Control". [2] The Center for Prevention Services became the National Center for HIV, STD, and TB Prevention in 1996. [3]
AIDS-defining clinical conditions (also known as AIDS-defining illnesses or AIDS-defining diseases) is the list of diseases published by the Centers for Disease Control and Prevention (CDC) that are associated with AIDS and used worldwide as a guideline for AIDS diagnosis. CDC exclusively uses the term AIDS-defining clinical conditions, but the ...
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. [88] HIV is a member of the genus Lentivirus, [89] part of the family Retroviridae. [90] Lentiviruses share many morphological and biological characteristics.
Nucleic-acid-based tests amplify and detect one or more of several target sequences located in specific HIV genes, such as HIV-I GAG, HIV-II GAG, HIV-env, or the HIV-pol. [32] [33] Since these tests are relatively expensive, the blood is screened by first pooling some 8–24 samples and testing these together; if the pool tests positive, each ...
The 2021 CDC HIV Surveillance Report estimates that 36,136 new cases of HIV infections were diagnosed in the United States in 2021, a rate of 11.3 per 100,000 population. [103] This rate is an increase from the previous year's estimates, which indicated 30,585 new infections and a rate of 9.5 per 100,000 population. [103]