Ans. HIV (Human Immunodeficiency Virus) is the virus that causes AIDS. This virus is passed from one person to another through blood, using shared needles and sexual contact. In addition, infected pregnant women can pass HIV to their baby during pregnancy or delivery, as well as through breast-feeding. People with HIV have what is called HIV infection. Most of these people develop AIDS as a result of HIV infection.

These body fluids have been proven to spread HIV:

blood semen vaginal fluid breast milk other body fluids containing blood.

Other additional body fluids that may transmit the virus that healthcare workers may come into contact with are

cerebrospinal fluid surrounding the brain and the spinal cord synovial fluid surrounding bone joints amniotic fluid surrounding a foetus.

Ans. AIDS stands for Acquired Immunodeficiency Syndrome. An HIV-infected person receives a diagnosis of AIDS after developing one of the CDC-defined AIDS indicator illnesses. An HIV positive person who has not had any serious illnesses also can receive an AIDS diagnosis on the basis of certain blood tests (CD4+ counts).

A positive HIV test result does not mean that a person has AIDS. A diagnosis of AIDS is made by a physician using certain clinical criteria (e.g. AIDS indicator illnesses). Infection with HIV can weaken the immune system to the point that it has difficulty fighting off certain infections. These type of infections are known as "opportunistic" infections because they take the opportunity a weakened immune system gives to cause illness.

Many of the infections that cause problems or may be life-threatening for people with AIDS are usually controlled by a healthy immune system. The immune system of a person with AIDS is weakened to the point that medical intervention may be necessary to prevent or treat serious illness.

Ans. We do not know. Scientists have different theories about the origin of HIV, but none have been proven. The earliest known case of HIV was from a blood sample collected in 1959 from a man in Kinshasha, Democratic Republic of Congo. (How he became infected is not known.) Genetic analysis of this blood sample suggests that HIV-1 may have stemmed from a single virus in the late 1940s or early 1950s.

We do know that the virus existed in the United States since at least the mid to late 1970s. From 1979-1981 rare type of pneumonia, cancer, and other illnesses were being reported by doctors in Los Angeles and New York among a number of gay male patients. These were conditions not usually found in people with healthy immune systems.

In 1982 public health officials began to use the term "Acquired Immunodeficiency Syndrome," or AIDS, to describe the occurrences of opportunistic infections, Kaposi's sarcoma, and Pneumocystis carinii pneumonia in healthy men. Formal tracking (surveillance) of AIDS cases began that year in the United States.

The cause of AIDS is a virus that scientists isolated in 1983. The virus was at first named HTLV-III/LAV (human T-cell lymphotropic virus-type III/lymphadenopathy-associated virus) by an international scientific committee. This name was later changed to HIV (Human Immunodeficiency Virus). The inescapable conclusion of more than 15 years of scientific research is that people, if exposed to HIV through sexual contact or injecting drug use, may become infected with HIV. If they become infected, most of them will eventually develop AIDS.

Ans. Since 1992, scientists have estimated that about half the people with HIV develop AIDS within 10 years after becoming infected. This time varies greatly from person to person and can depend on many factors, including a person's health status and their health-related behaviours. Today there are medical treatments that can slow down the rate at which HIV weakens the immune system. As with other diseases, early detection offers more options for treatment and preventative healthcare.

Ans. AIDS affects people primarily when they are most productive and leads to premature death thereby severely affecting the socio-economic structure of whole families, communities and countries. Besides, AIDS is not curable and since HIV is transmitted predominantly through sexual contact, and with sexual practices being essentially a private domain, these issues are difficult to address.

Ans. You can avoid HIV infection by abstaining from sex, by having a mutually faithful monogamous sexual relationship with an uninfected partner or by practicing safer sex. Safer sex involves the correct use of a condom during each sexual encounter and also includes non-penetrative sex.

Ans. Children and adolescents have the right to know how to avoid HIV infection before they become sexually active. As some young people will have sex at an early age, they should know about condoms and where they are available. Parents and schools share the responsibility of ensuring that children understand how to avoid HIV infection, and learn the importance of tolerant, compassionate and non-discriminatory attitudes towards people living with HIV/AIDS.

Ans. Yes, if the injecting equipment is contaminated with blood containing HIV. Avoid injections unless absolutely necessary. If you must have an injection, make sure the needle and syringe come straight from a sterile package or have been sterilised properly; a needle and syringe that has been cleaned and then boiled for 20 minutes is ready for reuse. Finally, if you inject drugs of whatever kind, never use anyone else's injecting equipment.

Ans. Tattooing, ear piercing, acupuncture and some kind of dental work all involve instruments that must be sterile to avoid infection. In general, you should refrain from any procedure if the skin is pierced, unless absolutely necessary.

Ans. All the currently licensed antiretroviral drugs, namely AZT, DDL and DDC, have effects which last only for a limited duration. In addition, these drugs are very expensive and have severe adverse reactions while the virus tends to develop resistance rather quickly with single-drug therapy. The emphasis is now on giving a combination of drugs including newer drugs called protease inhibitors; but this makes treatment even more expensive. WHO's present policy does not recommend antiviral drugs but instead advocates strengthening of clinical management for HIV- associated opportunistic infections such as tuberculosis and diarrhoea. Better care programmes have been shown to prolong survival and improve the quality of life of people living with HIV/AIDS

Ans. If we look at AIDS as a worldwide pandemic, it appears as if it is something new and rather sudden. But if we look at AIDS as a disease and at the virus that causes it, we get a different picture. We find that both the disease and the virus are not new. They were there well before the epidemic occurred. We know that viruses sometimes change. A virus that was once harmless to humans can change and become harmful. This is probably what happened with HIV long before the AIDS epidemic. What is new is the rapid spread of the virus. Researchers believe that the virus was present in isolated population groups years before the epidemic began. Then the situation changed – people moved more often and traveled more, they settled in big cities and lifestyles changed, including patterns of sexual behaviour. It became easier for HIV to spread through sexual intercourse and contaminated blood. As the virus spread, the disease which was already in existence became a new epidemic.

Ans. Yes. Most workers face no risk of getting the virus while doing their work. The virus is mainly transmitted through the transfer of blood or sexual fluids. Since contact with blood or sexual fluids is not part of most people's work, most workers are safe.