210 ILCS 85/10.2
Because the candid and conscientious evaluation of clinical practices is essential to the provision of adequate hospital care, it is the policy of this State to encourage peer review by health care providers. Therefore, no hospital and no individual who is a member, agent, or employee of a hospital, hospital medical staff, hospital administrative staff, or hospital governing board shall be liable for civil damages as a result of the acts, omissions, decisions, or any other conduct, except those involving wilful or wanton misconduct, of a medical utilization committee, medical review committee, patient care audit committee, medical care evaluation committee, quality review committee, credential committee, peer review committee, or any other committee or individual whose purpose, directly or indirectly, is internal quality control or medical study to reduce morbidity or mortality, or for improving patient care within a hospital, or the improving or benefiting of patient care and treatment, whether within a hospital or not, or for the purpose of professional discipline including institution of a summary suspension in accordance with Section 10.4 of this Act and the medical staff bylaws. Nothing in this Section shall relieve any individual or hospital from liability arising from treatment of a patient. For the purposes of this Section, "wilful and wanton misconduct" means a course of action that shows actual or deliberate intention to harm or that, if not intentional, shows an utter indifference to or conscious disregard for a person's own safety and the safety of others.
210 ILCS 85/10.2