penetrating trauma

Penetrating traumas take on a unique trajectory. They can be erratic, asymmetrical and variable in depth and extent. So real estate in the body, and good fortune, matter most.
Surviving and thriving after penetrating traumas depends on two key factors.
Rep. Steve Scalise (R-LA) is back in intensive care after progressing from last month's shooting on a baseball field. Why do traumas, like gunshot wounds, require such comprehensive interventions? And why do thery carry infection risks?