If you have autoimmune symptoms like sickness & nausea, that's a sign of an underlying infection in your body.
If your get stomach bug, your body creates sickness & nausea to try flush that bug out.
I believe these autoimmune symptoms are created by infections & overgrowths in your body. Then, your body's creating these nausea & sickness symptoms to try flush that infection out.
I've helped hundreds of people with autoimmune issues that suffered from nausea and we got rid of the underlying infections & overgrowths, that's creating the problems.