More than 120,000 people in the U.S. are living with acute lymphoblastic leukemia (ALL), and 6,000 new cases are diagnosed each year. Of those, more than 3,500 will be in children. Responsible for 75% of all pediatric leukemia diagnoses, ALL is a rapid-onset blood cancer, preventing the body from producing mature, infection-fighting white blood cells, sometimes within a matter of months.