the blood drawn from a healthy person for the benefit of a patient; selling it is forbidden. However, if the patient’s life depends on it, or if it is required for surgical procedures, then paying compensation for it becomes permissible due to necessity. In that case, the sin falls upon the recipient of the payment, whereas the one who pays out of need or compulsion bears no blame. The Council of Senior Scholars has issued a resolution on this matter, setting out this detailed ruling.