EurekAlert -- Acquired Immune Deficiency Syndrome (AIDS) is a global epidemic threatening the lives of millions of people. Because there is no known cure, prevention of the transmission of the virus that causes AIDS, the Human Immunodeficiency Virus (HIV), is critical for controlling the disease. The transmitting routes of HIV include breastfeeding, which passes the virus from mothers to infants. This is a major problem in many areas of Africa, where HIV-positive mothers have no alternative to breastfeeding. So far, no practical and effective methods are available to prevent HIV transmission by this route.