Acquired Immune Deficiency Syndrome is known as AIDS in the short form. AIDS is in fact the collection of certain symptoms and infections in the human organism which permanently leads to the damage of the human immune system. AIDS is in other ways considered as the body's defence system which hampers the normal functioning of the body organs to a great extent. The basic cause of AIDS is the two types of viruses, namely the HIV 1 and the HIV 2. Basically these two types of viruses are thus responsible in the performance of the defence mechanism system of the body.

The most common cause of AIDS is considered to be the unprotected sex. Sex without taking proper precaution like condom is very much responsible for AIDS. AIDS is generally transmitted through the semen. It is estimated that more than three million people round the globe had died through AIDS. During the prenatal stage also it is found that the mother will transmit the disease to the fetus before it is born. AIDS is transferred to the blood through the means of transfusion of blood into another's body cell. Besides these, AIDS can also be caused through the use of injections which are not properly sterilized in the process of taking drugs or blood into the veins.

Symptoms of AIDS are not visible at the early stage. But at least after a period of 3 to 6 weeks the symptoms of AIDS can be noticed through certain flu like sickness. Besides these, symptoms like headache, nausea, fever, fatigue, diarrhea, etc. are also considered as other AIDS symptoms. But it can be mentioned out here though these symptoms occur in an AIDS patient, it lasts for only a temporary period of time after which it disappears. Sometimes acute AIDS symptoms also cannot be considered as the symptoms of AIDS, as they may also be found to be very much common to other forms of diseases. Thus symptoms either mild or severe cannot be considered as solely the symptoms of AIDS as other forms of sickness or diseases also witness the similar symptoms. But however, when the disease reaches its critical stage, the symptoms become very much acute thus leading to loss of weight, recurrent fever and also occurrence of certain fatal diseases. AIDS thus totally destroys the immune system of the body totally. AIDS is thus a deadly disease which is the result of unprotected sex, hence to prevent it is to avoid unprotected sex.