Immunology is a branch of biology that covers the study of the immune system of all organisms. It is a biomedical science in which graduate students’ immune response to antigenic substances and their methods. The immune response is the body’s response to antigenic stimuli and is a biological process that identifies and excludes antigenic material. Immunology has applications in many medical fields, particularly in the fields of organ transplantation, oncology, virology, bacteriology, parasitology, psychiatry, and dermatology.