Immunology is the study of the immune system and its reaction to pathogens, as well as its malfunctions (autoimmune diseases, allergies, rejection of organ transplants).
... viz., the merit of good works and transubstantiation (iv. 2), purgatory (iv. 9), and the worship of saints (i. 13, ii. 9, iii. 6, 59). In other works, however, Thomas ...