Acquired Immuno Deficiency Syndrome (AIDS) is a human disease due to Human Immunodeficiency Virus (HIV). There is two types of HIV : HIV -1 (more infective) & HIV - 2. The HIV virus affects the CD4 and T cells which are vital in defending the immune system.

AIDS was first clinically observed in 1981 in US. More than 36 million deaths were reported (as of 2012).

World AIDS Day, observed on 1 December every year, is dedicated to raising awareness of the AIDS pandemic caused by the spread of HIV infection. The red ribbon is a symbol for solidarity with HIV positive people (those living with AIDS).

Symptoms : Influenza like illness is the initial common symptom found within one month to exposure of the virus. Other symptoms include fever, large tender lymph nodes, throat inflammation, headache, sores of the mouth and genitals. Gastrointestinal symptoms such as nausea, vomiting or diarrhea for a period of two weeks.

These symptoms can also may be due to some other diseases. So those who have risk factors for infection may be tested accordingly.

This will be followed by a long period without any symptoms (Clinical latency period, may vary from 3 to 20 years). As the disease progresses, immune system will be affected severely and tumors will be formed. Kaposi's sarcoma is the most common cancer occurring in 20 % of HIV infected. Infection of TB is also found.

Transmission :Unprotected sexual intercourse, blood transfusion, unsterile usage of syringes, mother to child during breast feeding etc.

Misconceptions : Many still avoids reading or searching AIDS related information fearing infection!.

AIDS is not transmitted by shaking hands, hugging, sharing food, door knobs, towel, swimming pool, toilet seat etc with an infected person.
Saliva, sweat, tears, sneezing, spitting, urine etc don't transmit the disease. Mosquitoes and other insects do not transmit the disease.