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Basic Information


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En Espaol

HIV

AIDS

Origin of HIV

Brief History of HIV In the United StatesHow HIV Is and Is Not ransmitted

!is" #actors for HIV ransmission

$re%enting ransmission

Symptoms of HIV Infection

HIV esting

#inding a esting Site

Additional !eso&rces for Basic Information

HIV

HIV stands for h&man imm&nodeficiency %ir&s' his is the %ir&s that ca&ses AIDS' HIV isdifferent from most other %ir&ses (eca&se it attac"s the imm&ne system' he imm&ne system

gi%es o&r (odies the a(ility to fight infections' HIV finds and destroys a type of white (lood

cell ) cells or *D+ cells, that the imm&ne system m&st ha%e to fight disease'

Str&ct&re of the H&man Imm&nodeficiency Vir&s- co&rtesy of NIAID'

#or more information%iew o&r .&estions and answers on HIV science'

Bac" to Inde/

AIDS
http://www.cdc.gov/hiv/spanish/topics/basic/index.htmhttp://www.cdc.gov/hiv/topics/basic/index.htm#hivhttp://www.cdc.gov/hiv/topics/basic/index.htm#aidshttp://www.cdc.gov/hiv/topics/basic/index.htm#originhttp://www.cdc.gov/hiv/topics/basic/index.htm#historyhttp://www.cdc.gov/hiv/topics/basic/index.htm#transmissionhttp://www.cdc.gov/hiv/topics/basic/index.htm#riskhttp://www.cdc.gov/hiv/topics/basic/index.htm#preventionhttp://www.cdc.gov/hiv/topics/basic/index.htm#symptomshttp://www.cdc.gov/hiv/topics/basic/index.htm#testinghttp://www.cdc.gov/hiv/topics/basic/index.htm#findhttp://www.cdc.gov/hiv/topics/basic/index.htm#resourceshttp://www.cdc.gov/hiv/resources/qa/definitions.htmhttp://www.cdc.gov/hiv/resources/qa/definitions.htmhttp://www.cdc.gov/hiv/topics/basic/index.htm#tophttp://www.cdc.gov/hiv/spanish/topics/basic/index.htmhttp://www.cdc.gov/hiv/topics/basic/index.htm#hivhttp://www.cdc.gov/hiv/topics/basic/index.htm#aidshttp://www.cdc.gov/hiv/topics/basic/index.htm#originhttp://www.cdc.gov/hiv/topics/basic/index.htm#historyhttp://www.cdc.gov/hiv/topics/basic/index.htm#transmissionhttp://www.cdc.gov/hiv/topics/basic/index.htm#riskhttp://www.cdc.gov/hiv/topics/basic/index.htm#preventionhttp://www.cdc.gov/hiv/topics/basic/index.htm#symptomshttp://www.cdc.gov/hiv/topics/basic/index.htm#testinghttp://www.cdc.gov/hiv/topics/basic/index.htm#findhttp://www.cdc.gov/hiv/topics/basic/index.htm#resourceshttp://www.cdc.gov/hiv/resources/qa/definitions.htmhttp://www.cdc.gov/hiv/topics/basic/index.htm#tophttp://www.cdc.gov/hiv/resources/qa/definitions.htmhttp://www.cdc.gov/hiv/resources/qa/definitions.htm


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AIDSstands for ac.&ired imm&nodeficiency syndrome' AIDS is

the final stage of HIV infection' It can ta"e years for a person

infected with HIV- e%en witho&t treatment- to reach this stage'

Ha%ing AIDS means that the %ir&s has wea"ened the imm&ne

system to the point at which the (ody has a diffic&lt time fighting

infection' 0hen someone has one or more specific infections-certain cancers- or a %ery low n&m(er of cells- he or she is

considered to ha%e AIDS' #or more information %iew o&r

.&estions and answers on HIV science'Electron microscope

image of HIV- seen as

small spheres on the

s&rface of white (lood

cells'

Bac" to Inde/

Origin of HIV

Scientists identified a type of chimpan1ee in 0est Africa as the

so&rce of HIV infection in h&mans' he %ir&s most li"ely 2&mped to

h&mans when h&mans h&nted these chimpan1ees for meat and came

into contact with their infected (lood' O%er se%eral years- the %ir&s

slowly spread across Africa and later into other parts of the world'

#or more information %iew o&r .&estion and answer on the origin of

HIV'

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Brief History of HIV in the United States

HIV was first identified in the United States in 3453 after a n&m(er of gay men started

getting sic" with a rare type of cancer' It too" se%eral years for scientists to de%elop a test for

the %ir&s- to &nderstand how HIV was transmitted (etween h&mans- and to determine what

people co&ld do to protect themsel%es'

In 6775- *D* ad2&sted its estimate of new HIV infections (eca&se of new technology and

de%eloped (y the agency' Before this time- *D* estimated there were ro&ghly +7-777 new

HIV infections each year in the United States' New res&lts shows there were dramatic

declines in the n&m(er of new HIV infections from a pea" of a(o&t 387-777 in the mid 3457sto a low of ro&ghly 97-777 in the early 3447s' !es&lts also shows that new infections

increased in the late 3447s- followed (y a le%eling off since 6777 at a(o&t 99-777 per year' In

677:- an estimated 9:-877 indi%id&als were infected with HIV'

AIDS cases (egan to fall dramatically in 344:- when new dr&gs (ecame a%aila(le' oday-

more people than e%er (efore are li%ing with HIV;AIDS' *D* estimates that a(o&t 3 million

people in the United States are li%ing with HIV or AIDS' A(o&t one .&arter of these people

do not "now that theyare infected< not "nowing p&ts them and others at ris"'

Bac" to Inde/
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