Immunology is a branch of medicine and biology that covers the medical study of the immune system and/or immunity - the range of defenses developed by the human body to protect itself. Immunological disorders caused by a dysfunction of the immune system could include allergy, asthma, autoimmune disease, autoinflammatory syndromes, and immunological deficiency syndromes.
Dermatology is the branch of medicine dealing with the skin. It is a specialty with both medical and surgical aspects. A dermatologist is a specialist medical doctor who manages diseases related to skin, hair, nails, and some cosmetic problems.