HIV (Human Immunodeficiency Virus) infection has now spread to all countries of the world and has over 40 million people infected around the world at the end of 2003. More than 1.1 million people in the United States have been infected with HIV. The scourge of HIV was particularly devastating in Africa south of Sahara. The percentage of women among adults is infected with HIV is increasing. HIV in the blood and genital secretions of virtually all people are living with HIV exist, » Read more: HIV is the cause
