The Youth Risk Behavior Surveillance Systems monitor six categories of priority health risk behaviors among youth and young adults: (1) behaviors that contribute to intentional or unintentional injuries; (2) tobacco use (3) alcohol and other drug use; (4) sexual behaviors that contribute to unintended pregnancy and sexually transmitted diseases; (5) unhealthy dietary behaviors; and (6) physical inactivity. This report summarizes results from the national survey; 24 state surveys; and nine local surveys conducted among high school students during February through May 1993. Results include: 72% of all deaths among school-age youth and young adults are from four causes: motor vehicle crashes, other unintentional injuries, homicide, and suicide; 22.1% of youth had carried a weapon during the 30 days preceding the survey; 8.6% had attempted suicide during the 12 months preceding the survey; 53% of high school students had had sexual intercourse; 30.5% of high school students had smoked cigarettes during the 30 days preceding the survey; and only 15.4% had eaten five or more servings of fruits and vegetables on the day preceding the survey. The document includes a list of reports published in CDC surveillance summaries since January 1, 1985, 25 tables of data, and an appendix of state and local youth risk behavior surveillance system coordinators. (JE)