Question: what autoimmune disease attacks the lungs?
Answer: This is called idiopathic ILD. Idiopathic pulmonary fibrosis (IPF) is the most common disease of this type. There are also dozens of known causes of ILD, including: Autoimmune diseases (in which the immune system attacks the body) such as lupus, rheumatoid arthritis, sarcoidosis, and scleroderma.