The prevalence of high school students in the United States who were taught about HIV/AIDS decreased from 87 percent in 2009 to 84 percent in 2011, according to the 2011 National Youth Risk Behavior Survey from the Centers for Disease Control and Prevention. From 1991 to 1997, the percentage of students nationwide who learned about HIV/AIDS climbed from 83 to 92 percent. The number dropped from 1997 to 2011, dipping from 92 to 84 percent. Other results from the 2011 survey show: 47 percent of students have been sexually active during their lifetimes; 34 percent had sexual intercourse during the three months before the survey; 15 percent had sexual intercourse with four or more people during their lifetimes; of those students who said they were sexually active, 60 percent used a condom the last time they had sex; and 13 percent of students had been tested for HIV.

To read the complete survey results, click here.