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HIV is spread primarily by unprotected sex (including anal and vaginal sex), contaminated hypodermic needles or blood transfusions, and from mother to child during pregnancy, delivery, or breastfeeding. [18] Some bodily fluids, such as saliva, sweat, and tears, do not transmit the virus. [19] Oral sex has little risk of transmitting the virus. [20]
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.
An HIV antibody test usually detects the HIV antibodies within two to eight weeks, but can have a valid negative result for a long as 2 to 6 months after initial infection. Viral load tests can also be used to diagnose HIV infection, especially in children under 18 months born to mothers with HIV, where the presence of maternal antibodies ...
[4] In most cases, HIV is a sexually transmitted infection and occurs by contact with or transfer of blood, pre-ejaculate, semen, and vaginal fluids. [5] [6] Non-sexual transmission can occur from an infected mother to her infant during pregnancy, during childbirth by exposure to her blood or vaginal fluid, and through breast milk.
A microbicide for sexually transmitted diseases is a gel which would be applied to the skin – perhaps a rectal microbicide for persons who engage in anal sex or a vaginal microbicide for persons who engage in vaginal sex – and if infected body fluid such as blood or semen were to touch the gel, then HIV in that fluid would be destroyed and ...
HIV is spread when one of these bodily fluids: blood, semen, pre-seminal fluid, breast milk, rectal fluids, or vaginal fluids of an HIV-positive person comes into contact with a mucous membrane or bloodstream of an HIV-negative person. [4] HIV transmission can occur via: Unprotected sexual intercourse
The campaign seeks to spread the scientific evidence that undetectable means untransmittable. Since the beginning of the epidemic, perceptions and management of HIV infection have gone through many stages; from assuming the infectiousness, then discovering the routes of transmission (blood, sexual fluids, and breastfeeding), to prevention methods (education, condoms, PrEP, and PEP) and various ...
Human Immunodeficiency Virus (HIV) has the capability to enter a latent stage of infection where it exists as a dormant provirus in CD4+ T-cells.Most latently infected cells are resting memory T cells, [1] however a small fraction of latently infected cells isolated from HIV patients are naive CD4 T cells.