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The human immunodeficiency virus (HIV) [8] [9] [10] is a retrovirus [11] that attacks the immune system.It is a preventable disease. [5] There is no vaccine or cure for HIV. It can be managed with treatment and become a manageable chronic health condition. [5]
AIDS denialists argue that AIDS does not exist or that AIDS is not caused by HIV; some of its proponents believe that AIDS is caused by lifestyle, including sexuality or drug use, and not by HIV. Both forms of AIDS denialism contradict scientific consensus. The evidence that HIV causes AIDS is generally considered conclusive among pathologists ...
In 2016, about 36.7 million people were living with HIV, and it resulted in 1 million deaths. [11] There were 300,000 fewer new HIV cases in 2016 than in 2015. [12] Most of those infected, live in sub-Saharan Africa. [4]
HIV/AIDS can be transmitted sexually, via contaminated needles or blood transfusions, and from mother to child during pregnancy, birth or breast-feeding.
HIV-1 is the most common and most pathogenic strain of the virus. As of 2022, approximately 1.3 million such infections occur annually. [4] [5] Scientists divide HIV-1 into a major group (group M) and two or more minor groups, namely groups N, O and possibly a group P.
HIV-1 group M (responsible for the global pandemic) is estimated to have emerged in humans around 1920 near Kinshasa, then part of the Belgian Congo.This estimation was the result of time-scaled evolutionary models being applied to modern samples and retrieved early samples of HIV-1 (M).
The spread of HIV/AIDS has affected millions of people worldwide; AIDS is considered a pandemic. [1] The World Health Organization (WHO) estimated that in 2016 there were 36.7 million people worldwide living with HIV/AIDS, with 1.8 million new HIV infections per year and 1 million deaths due to AIDS. [2]
Figure 1. Early Symptoms of HIV. The stages of HIV infection are acute infection (also known as primary infection), latency, and AIDS. Acute infection lasts for several weeks and may include symptoms such as fever, swollen lymph nodes, inflammation of the throat, rash, muscle pain, malaise, and mouth and esophageal sores. The latency stage ...