AIDS: Risk Factors / Modes of Transmission / W. Africa The following are facts cited in “Acquired Immune Deficiency syndrome” by Gerald J. Stine. Worldwide, about 9,000 persons a day become HIV-infected. The majority of all HIV infections worldwide occur in people ages 15-24. Over 1 million people die of AIDS each year. The number of HIV-infections worldwide has tripled since 1990! It is estimated that there will be a 20% decline in population in East Africa by the year 2001 due to AIDS (Stine, 360). “AIDS is the leading cause of deaths among adult men and the second leading cause