Is sle really a genetic disease?

Somewhat genetic?: Sle (lupus) is an auto-immune disorder in which a person's immune system is reacting strongly against parts of his own body. The inflammation from the immune system reaction leads to symptoms. It is believed to be partly genetic (some people may be genetically more likely to get sle) and partly environmental (something happens in a person's life that sets off the auto-immune reaction).

SLE: Heredity does seem to play a role. Ten percent of lupus patients have a first-degree relative (sister, daughter, son, mother) or a second-degree relative (aunt, uncle, first cousin) with lupus.