RT Journal T1 Immunity: Principles and application in medicine and public health. JF American Journal of Diseases of Children JO American Journal of Diseases of Children YR 1939 FD March 1 VO 57 IS 3 SP 728 OP 729 DO 10.1001/archpedi.1939.01990030242022 UL http://dx.doi.org/10.1001/archpedi.1939.01990030242022 AB In this edition, the book formerly entitled "Resistance to Infectious Diseases" has been completely rewritten. It reflects the changed attitude of scientist and physician toward the subject of immunity and resistance to disease. Instead of being the basis of a rather specialized abstract branch of biologic science which interested chiefly laboratory and research workers, immunity has become a practical tool of the newer type of physician, who wants to know why and how the animal body reacts to diseases caused by various agents, including those of bacterial, virus and protozoan origin. The doctor who understands the basic principles of immunity and the fast accumulating knowledge in this field is better equipped to fight disease.With these facts in mind, the authors have admirably presented their subject matter. The first section, comprising sixteen chapters, deals with the principles and theory of immunity. It contains up-to-date knowledge concerning antigens, toxins, antibodies, agglutinins,