(1) Subject to the provisions of this section, the general provisions of Part 3 of Chapter 1 of this Code relating to causing an event shall apply with respect to causing death by harm.
(2) The death of a person shall be held to have been caused by harm if, by reason of the harm, death has happened otherwise or sooner, by however short a time, than it would probably have happened but for the harm.
(3) It is immaterial that the harm would not have caused the person's death but for his or her infancy, old age, disease, intoxication, or other state of body or mind, at the time when the harm was caused.
(4) It is immaterial that the harm would not have caused the person's death but for his or her refusal or neglect to submit to or seek proper medical or surgical treatment, or but for his or her negligent or improper conduct or manner of living or of treating the harm, unless it is made to appear that the person acted as he or she did with the purpose of causing his or her own death.
(5) Death shall be held to have been caused by harm if the death is caused by the medical or surgical treatment of the harm, unless such treatment itself amounts to murder or manslaughter.