No one ever wants to see any of their family members get hurt. But, wishful thinking only gets you so far in life. Because of this contradictory situation, one of the smartest things you can do to avoid a more tragic incident with a family member is to think about worst-case scenarios with them regularly.
That doesn’t mean that you should be anxious every time a family member is out of your sight. It does mean that you should prepare for medical emergencies and advance.