World AIDS Day

Versión en Español



Acquired immune deficiency syndrome or acquired immunodeficiency syndrome (AIDS) is a set of symptoms and infections resulting from the damage to the human immune system caused by the human immunodeficiency virus (HIV). This condition progressively reduces the effectiveness of the immune system and leaves individuals susceptible to opportunistic infections and tumors.  Learn more about AIDS



  • Globally, there were an estimated 33 million [30 million–36 million] people living with HIV in 2007.
  • The annual number of new HIV infections
    declined from 3.0 million [2.6 million–
    3.5 million] in 2001 to 2.7 million
    [2.2 million–3.2 million] in 2007.
  • Overall, 2.0 million [1.8 million–2.3 million] people died due to AIDS in 2007, compared with an estimated 1.7 million[1.5 million–2.3 million] in 2001.
  • While the percentage of people living with
    HIV has stabilized since 2000, the overall
    number of people living with HIV has
    steadily increased as new infections occur
    each year, HIV treatments extend life, and as new infections still outnumber AIDS deaths.
  • Southern Africa continues to bear a
    disproportionate share of the global burden of HIV: 35% of HIV infections and 38% of AIDS deaths in 2007 occurred in that sub region. Altogether, sub-Saharan Africa is home to 67% of all people living with HIV.
  • Women account for half of all people living
    with HIV worldwide, and nearly 60% of
    HIV infections in sub-Saharan Africa. Over
    the last 10 years, the proportion of women
    among people living with HIV has remained stable globally, but has increased in many regions.
  • Young people aged 15–24 account for
    an estimated 45% of new HIV infections
    worldwide. An estimated 370 000 [330 000–410 000] children younger than 15 years became infected with HIV in 2007. Globally, the number of children younger than 15 years living with HIV increased from 1.6 million [1.4 million–2.1 million] in 2001 to 2.0 million [1.9 million–2.3 million] in 2007. Almost 90% live in sub-Saharan Africa.
    source:Status of the global HIV epidemic
  • More about AIDS

    Center for AIDS prevention


    Children and HIV and AIDS


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    Versión en Español/ Spanish version

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