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This understanding of euthanasia emphasizes two important features of acts of euthanasia. First, that euthanasia involves the deliberate taking of a person's life; and, second, that life is taken for the sake of the person whose life it is - typically because she or he is suffering from an incurable or terminal disease. This distinguishes euthanasia from most other forms of taking life.
Classification of euthanasia
Euthanasia may be classified according to whether a person gives informed consent into three types: voluntary, non-voluntary and involuntary.
Voluntary euthanasia: Euthanasia conducted with the consent of the patient is termed voluntary euthanasia. Active voluntary euthanasia is legal in Belgium, Luxembourg and the Netherlands. Passive voluntary euthanasia is legal throughout the U.S. per Cruzan v. Director, Missouri Department of Health. When the patient brings about his or her own death with the assistance of a physician, the term assisted suicide is often used instead. Assisted suicide is legal in Switzerland and the U.S. states of Oregon, Washington and Montana.
Non-voluntary euthanasia: Non-voluntary euthanasia (sometimes known as mercy killing) is euthanasia conducted where the explicit consent of the individual concerned is unavailable, such as when the person is in a persistent vegetative state. It contrasts with involuntary euthanasia, where euthanasia is performed against the will of the patient. The decision can be made based on what the incapacitated individual would have wanted, or it could be made on substituted judgment of what the decision maker would want were he or she in the incapacitated person's place, or finally, the decision could be made by the doctor by his own decision.
Involuntary euthanasia: Involuntary euthanasia occurs when euthanasia is performed on a person who is able to provide informed consent, but does not, either because they do