Exagen Inc. (XGN) is a biotechnology company focused on developing and commercializing diagnostic tests for autoimmune diseases. Their main product is the VeraStrat test, which assists physicians in deciding on appropriate treatment for patients with lung cancer. Exagen Inc. is known for its innovative approach to developing diagnostic tools and efforts to bring improvements in the treatment of autoimmune diseases. Exagen Inc. (XGN) shares could be suitable for investors who are tracking the biotechnology sector and seeking investment opportunities in the field of autoimmune disease diagnostics and treatment.