Bovine Lactoferrin ( BLF ) mainly exists in numerous exocrine secretions of mammals, and its content in milk is the higest. Lactoferrin not only has broad spectrum of antimicrobial properties, but also has the ability to improve antiviral activity, and anticancer activity, and immunoregulatory activity of the body to prevent and cure infectious disease. Occident, Japan and few developed country exploit lactoferrin to develop drug, immune accelerant and infant food which prevent human immunodeficiencyvirus (...