Find an allergy doctor and an asthma doctor in Brooklyn at Century Medical and Dental to treat your symptoms. You can even have your child treated by a pediatric immunologist. Immunology is the study of the immune system and the medical science practiced by allergy doctors and asthma doctors. An allergy occurs when your immune system doesn’t work properly against an external irritant like pollen. Asthma can result from an allergy. The asthma doctors and allergy doctors at Century Medical and Dental have years of experience, skill with all kinds of immunology issues and access to the latest technology available.