By Lindley Estes
The Free Lance-Star
FREDERICKSBURG, Va. — Katie Mueda’s life changed in an instant in 2011.
One minute she was on the soccer field, and sports were her life.
The next, a ball collided with her head, spelling the end of contact sports for the now 16-year-old Massaponax High School junior who sustained a severe concussion.
The effects of the collision would plague her for years.