Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: One example is type 1 diabetes . In this disease, the immune system attacks cells of the pancreas. Other examples are multiple sclerosis and rheumatoid arthritis. In multiple sclerosis , the immune system attacks nerve cells. This causes weakness and pain. In rheumatoid arthritis , the immune system attacks the cells of joints. This causes joint damage and pain. Answer: immune system
A:
What system is involved in diseases that include type 1 diabetes, rheumatoid arthritis and multiple sclerosis?