AIDS is the disease caused by the damage that HIV does to your immune system. You have AIDS when you get rare, dangerous infections or have a super low number of CD4 cells. AIDS is the most serious stage of HIV, and it leads to death over time.
1 One in every 330 Americans will develop cancer by the age of 20. 2  On the average, 12,500 children and adolescents in the U.S. are diagnosed with cancer each year. 3  On the average, 1 in every 4 elementary school has a child with cancer. 4  The average high school has two students who are a current or former cancer patient.
Childhood cancer remains the leading cause of death by disease among children in the United States. Every day, 43 children are diagnosed with cancer and the average age of diagnosis is 6. Cancer affects all ethnic, gender, and socio-economic groups and more than 40,000 children undergo treatment for cancer each year. The causes of childhood cancers are largely unknown, and for the most part they cannot be prevented.