Polymyalgia rheumatica. Multiple sclerosis. Anklyosing spondylitis. Type 1 diabetes. Vasculitis. Peripheral neuropathy. The list goes on, and on, and on. We are being increasingly diagnosed with these conditions and diseases of unknown origin, and science has very little to say – why would autoimmune diseases and mysterious diseases of inflammation be so prevalent? When did this increase start?
As an observer and participant in modern biomedical research, and a lover of deep history, I tend to focus not on the immediate or last few years, but look for trends of accumulating risk over longer periods of time. Seeking an answer to the question of "when", I used Pubmed to estimate, per yer, the number of studies and papers discussing diseases and conditions of unknown origin. I search for the term "unknown causes", and also for the term "journal" to get some idea of the percentage of studies, papers and editorials discussing disease of unknown causes. I had no idea what to expect.