The immune system is insanely complex, and a great deal of autoimmune illness is not easily diagnosable with simple blood tests. Many types only get diagnosed a

The immune system is insanely complex, and a great deal of autoimmune illness is not easily diagnosable with simple blood tests. Many types only get diagnosed after they've wreaked sufficient havoc to show up on radiographic images. Many of these illnesses are triggered in part by infections. There's at least a subset of Covid patients that seem to have an unfortunate autoimmune aspect to blame for their severe symptoms[1]. It's only recently that many neurological autoimmune illnesses affecting behavior are being widely recognized[2]. There are likely many such subtle but profoundly debilitating malfunctions happening all the time in people with various genetic vulnerabilities, and so rather than immediately reaching for a psychosomatic explanation we should recognize how much we still have to learn. 1. https://www.sciencemag.org/news/2020/09/hidden-immune-weakness-found-14-gravely-ill-covid-19-patients https://www.sciencemag.org/news/2020/09/hidden-immune-weakne... 2. https://www.med.upenn.edu/autoimmuneneurology/nmdar-encephalitis.html#:~:text=Anti%2DNMDA%20receptor%20encephalitis%20is,NMDA%20receptors%20in%20the%20brain https://www.med.upenn.edu/autoimmuneneurology/nmdar-encephal....