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.
November 13, 2015. A new government survey of parents suggests that 1 in 45 children, ages 3 through 17, have been diagnosed with autism spectrum disorder (ASD). This is notably higher than the official government estimate of 1 in 68 American children with autism, by the Centers for Disease Control and Prevention (CDC).