Immune system or the use of immunosuppressive medication. In contrast, autoimmunity results from a hyperactive immune system attacking normal tissues as if they were foreign organisms. Common autoimmune diseases include Hashimoto's thyroiditis, rheumatoid arthritis, diabetes mellitus type 1, and systemic lupus erythematosus. Immunology covers the study of all aspects of the immune system. Immunology is a science that examines the structure and function of the immune system. It originates from medicine and early studies on the causes of immunity to disease. The earliest known reference to immunity was during the plague of Athens in 430 BC. Thucydides noted that people who had
Wolf attack animal may break off the attack or be convinced to look elsewhere for its next meal. In contrast, during "determined" predatory attacks, the victims may be repeatedly bitten on the head and face and dragged off and consumed, sometimes as far away as 1-2.5 km from the attack site, unless the wolf or wolves are driven off. Experts in India use the term "child lifting" to describe predatory attacks in which the animal silently enters a hut while everyone is sleeping, picks up a child, often with a silencing bite to the mouth and nose, and carries a child off