Use double quotes to find documents that include the exact phrase: "aerodynamic AND testing"
Group of teenagers sitting on the floor of a gymnasium

The number of concussions reported among Canadian youth has increased annually by 10.3% between 2004 and 2015. Even so, many concussions go unreported. To improve concussion reporting and health outcomes for youth, consider how youths’ social networks influence their behaviour, and explore new ways of enabling youth to help each other learn about concussion.