SLE is not contracted. It's unknown why SLE occurs. The underlying cause of autoimmune diseases is not fully known.

HOW IS CONTRACTED

Genetics
The first mechanism may arise genetically. Environmental triggers
The second mechanism may be due to environmental factors like ultraviolet X-ray, virus, etc.

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Researchers have sought to find a connection between certain infectious agents (viruses and bacteria), but no pathogen can be consistently linked to the disease.

Everyone’s body has an immune system which is intended to fight infection. Autoimmune disorders occur when someone’s immune system attacks their bodies tissues instead of an infection or foreign substance.
Lupus is an autoimmune disease where your immune systems turns on itself and starts attacking your body. There are four types: systemic, subacute cutaneous, discoid, and drug-induced. Systemic is the one that type can affect organs in a major way on occasion

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