15% of high school students report having had at least one concussion (in a 12-month period) while participating in a sport or physical activity.
6% report two or more concussions.
Black and Hispanic students are more likely to report 4 or more concussions.
Source: Centers for Disease Control and Prevention, 2018. https://www.cdc.gov/mmwr/volumes/67/wr/mm6724a3.htm