Serious injury or illness
Serious injury or illness means: In the case of a current member of the Armed Forces, including a member of the National Guard or Reserves, an injury or illness that was incurred by the covered servicemember in the line of duty on active duty in the Armed Forces or that existed before the beginning of the member's active duty and was aggravated by service in the line of duty on active duty in the Armed Forces and that may render the servicemember medically unfit to perform the duties of the member's office, grade, rank, or rating; and