.
Chapters
0:00 Introduction
0:26 Affects Immune System
0:48 Transmits via bodily fluids
1:08 Anyone can get it
1:25 You may not know you have it
1:48 It is manageable
2:15 Two HIV strains
2:34 It is preventable
2:54 Supports opportunistic infections
3:32 Still a major problem
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] Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype.[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. Research has shown (for both same-sex and opposite-sex couples) that HIV is untransmittable through condomless sexual intercourse if the HIV-positive partner has a consistently undetectable viral load.[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.[7][8][9][10] Within these bodily fluids, HIV is present as both free virus particles and virus within infected immune cells.
HIV infects vital cells in the human immune system, such as helper T cells (specifically CD4 T cells), macrophages, and dendritic cells.[11] HIV infection leads to low levels of CD4 T cells through a number of mechanisms, including pyroptosis of abortively infected T cells,[12] apoptosis of uninfected bystander cells,[13] direct viral killing of infected cells, and killing of infected CD4 T cells by CD8 cytotoxic lymphocytes that recognize infected cells.[14] When CD4 T cell numbers decline below a critical level, cell-mediated immunity is lost, and the body becomes progressively more susceptible to opportunistic infections, leading to the development of AIDS.
1 view
249
44
5 months ago 00:19:47 1
СЕКРЕТ ЛИДЕРА КИТАЯ: 37 ФАКТОВ О СИ | #ВзглядПанченко
5 months ago 00:12:58 1
КТО ЗАТОПИЛ подводную лодку КУРСК ? 10 ФАКТОВ о таинственной гибели АПЛ К-141 Курск
5 months ago 00:11:30 1
Ваших кредитов НЕТ - Ростовщичество преступление!
5 months ago 00:08:39 1
9 Things Your Cat Does for You Without You Knowing
5 months ago 00:01:43 1
Grioten x -Prey - crashout! [AMV]
5 months ago 00:12:25 1
65 ВПЕЧАТЛЯЮЩИХ И ИНТЕРЕСНЫХ ФАКТОВ ПРО ОЗЕРО БАЙКАЛ
5 months ago 00:32:47 1
RASPIEST Male Voices in the Blind Auditions of The Voice
5 months ago 00:06:59 2
Что я поняла за 20 лет | Как жить лучше 5 фактов
5 months ago 01:32:49 1
Genetically modified organisms
5 months ago 01:03:55 1
Bladee - Cold Visions [FULL ALBUM] [2024]
5 months ago 00:31:39 1
Ядерное Оружие. 10 Интересных Фактов
5 months ago 00:35:42 1
О восстановлении Советской Красной Армии и О фактах незаконного Министерства Обороны РФ
5 months ago 00:15:30 1
30 ФАКТОВ о НОВОЙ КАРТЕ - МТА ПРОВИНЦИЯ
5 months ago 00:00:56 1
10 Уникальных фактов за одну минуту #shorts #топ10 #факты
5 months ago 00:21:40 1
Обезьяны. 10 Интересных Фактов
5 months ago 00:22:15 1
What’s inside the Titanic?
5 months ago 00:13:52 28
ПЕРСОНА НА ДЖАГЕРА РАСКРЫТА / СЕСТРА ЮРНЕРО / BIRD KAZURAI НОВЫЕ ФАКТЫ О БУДУЩЕМ ГЕРОЕ DOTA 2
5 months ago 00:06:51 1
20 ФАКТОВ о КОТОРЫХ ты НЕ ЗНАЛ (скорее всего) Dead by Daylight
5 months ago 00:14:25 1
ГИПЕРБОРЕЯ - ПОЧЕМУ ЭТО СКРЫВАЮТ? Замалчиваемые факты о северной прародине славян
5 months ago 00:00:59 1
10 Обычных фактов за одну минуту #shorts #топ10 #факты
5 months ago 00:00:58 1
10 Свежих Фактов За Одну Минуту | #shorts
5 months ago 00:00:58 1
10 Очаровательных фактов за одну минуту #shorts #топ10 #факты
5 months ago 00:03:33 7
Десять интересных фактов о Вербном воскресенье | Телеканал Спас | Сергей Комаров
5 months ago 00:17:51 6
Tempo plus intéressant pour économiser sur l’électricité ? Fact checking !