After initial infection, a person may or may not find any information about the symptoms of influenza-like illness may be a short period of time. Usually, it is a long time in the course of symptoms. The infection interfere with the immune system, thus increasing the risk of infections like tuberculosis, and other opportunistic infections, and tumors that rarely affects people whose immune systems properly with them. Last infection known as AIDS. This stage is often associated with weight loss. HIV is mainly transmitted by unprotected sex and contaminated blood, needles, and from mother to child during pregnancy, childbirth or breastfeeding passed. Some body fluids such as saliva and tears, do not transmit HIV. Prevention methods, including safe sex, needle-exchange programs to treat those who are infected, and circumcision Mrdan.dr disease in a child is often giving anti-retroviral treatment to both mother and child prevented. Although antiretroviral therapy can slow the course of disease and may return to near-normal life. Without treatment, the average survival time after infection is 11 years. In 2014, about 37 million people were infected with HIV that has led to 1.2 million deaths. Many of those infected live in sub-Saharan Africa. HIV / AIDS is an epidemic over a large area, which is actively spread. It is believed that HIV in West Africa during the late 19th or early 20th century arose. AIDS first by the United States Centers for Disease Control and Prevention was recognized in 1981 and was known in early HIV infection.