Enzyme-linked immunosorbent assay (ELISA) simplified

Why was the ELISA test sad after a negative result? Because it is very sensitive! HAHAHA! Sensitive, get it? HAHAHA!

Once you get an autoimmune disease, you are more likely to get others. Why?

Question: Hi, Can you explain why once you get an autoimmune disease you are more likely to get others? Thanks!