MEANING : (n.) an intelligent person with a non-social obsession (such as computer programming) that renders him/her annoying or unattractive.
Celiac disease is believed to be an autoimmune disorder. While genetics appear to play a role in causing it, some people at risk for celiac disease will not develop it until something triggers their immune system, such as a viral infection or severe emotional stress. An Introduction to Celiac Disease and Its Causes.
It is not clear what causes celiac disease. A combination of environmental and genetic factors is important. Celiac disease occurs widely in Europe, North and South Americas, Australia, North Africa, the Middle East, and in South Asia.