The next update will now include shelter inhabitants entering a brief period of unconsciousness before they die. This state is reached when the character takes damage that would normally kill them, either from combat or illnesses.
In order to revive the unconscious member before they slip away into the eternal abyss you will have to have a fully charged defibrillator ready to zap them back to life. The defibrillator can be unlocked by playing through the new surrounded game mode, so giving it a play through will be extremely beneficial as you can now avoid the death of your characters. Also there’s no need to worry about power being out as the defibrillator will hold its charge for a brief period, this is handy when you are in a sticky situation.