Researchers from the Israel Center for Disease Control and the University of Haifa have discovered that breast-fed babies have a reduced risk for childhood leukemia, the most common form of childhood cancer. The study, published this week in the Journal of the American Medical Association (JAMA) Pediatrics, shows that breast-fed children and teens-who were breast-fed for at least six months-are 19 percent less likely to develop childhood leukemia than their counterparts breast-fed for less than six months.