Ilya Ilich Metchnikov was a prominent Russian biologist, zoologist and immunologist in the late 19th and early 20th centuries. As a pioneer in the field of immunology, Metchnikov is often attributed with discovering the phagocytic cells of the immune system, which play a crucial role in fighting off infections. Alternatively, he is also known for his groundbreaking research on embryology, microbiology, and the study of marine fauna. Some synonyms for Metchnikov include "father of immunology", "zoological genius" and "scientific trailblazer". His contributions to the field of science have paved the way for modern medicine and we continue to benefit from his research to this day.