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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] It can be managed with treatment and become a manageable chronic health condition. [5]
The human immunodeficiency viruses (HIV) are two species of Lentivirus (a subgroup of retrovirus) that infect humans.Over time, they cause acquired immunodeficiency syndrome (AIDS), [1] [2] a condition in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. [3]
Immunodeficiency is also the hallmark of acquired immunodeficiency syndrome (AIDS), [11] caused by the human immunodeficiency virus (HIV). HIV directly infects a small number of T helper cells , and also impairs other immune system responses indirectly.
After the virus enters the body there is a period of rapid viral replication, leading to an abundance of virus in the peripheral blood. During primary infection, the level of HIV may reach several million virus particles per milliliter of blood. [2] This response is accompanied by a marked drop in the numbers of circulating CD4 + T cells.
World AIDS Day, designated on 1 December every year since 1988, [1] is an international day dedicated to raising awareness of the AIDS pandemic caused by the spread of HIV infection and mourning those who have died of the disease. The acquired immunodeficiency syndrome (AIDS) is a life-threatening condition caused by the human immunodeficiency ...
AIDS is caused by a human immunodeficiency virus (HIV), which originated in non-human primates in Central and West Africa. While various sub-groups of the virus acquired human infectivity at different times, the present pandemic had its origins in the emergence of one specific strain – HIV-1 subgroup M – in Léopoldville in the Belgian ...
Secondary or acquired immune deficiencies are caused by something outside the body such as a virus or immune suppressing drugs. [ 6 ] Primary immune diseases are at risk to an increased susceptibility to, and often recurrent ear infections, pneumonia , bronchitis , sinusitis or skin infections.
HIV is an acronym for human immunodeficiency virus, which is the virus that causes AIDS (acquired immunodeficiency syndrome).Contracting HIV can lead to the development of AIDS or stage 3 HIV, which causes serious damage to the immune system.
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