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).
... in me". "-aham" (I) in the second line is nominative. na caaham = "...and not I....", meaning "but I am not...". "teshv-" (in/at/by them) at the end of the second ...