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.
According to estimates prepared by the National Cancer Institute, as of early 2004, there were 10,800,000 people in America who either have cancer currently or have had it at some point in the past. That's how many people have cancer in the United States. It's a shockingly high number. During 2008, it is estimated that over 1,437,000 new cases of cancer were diagnosed in the country. This number excludes noninvasive cancers except those affecting the urinary bladder.