Most of, if not all of them have nothing to do with what disease is. He is creating a definition wholecloth through his characteristics.
disease /dis·ease/ (dĭ-zēz´) any deviation from or interruption of the normal structure or function of any body part, organ, or system that is manifested by a characteristic set of symptoms and signs and whose etiology, pathology, and prognosis may be known or unknown.
The disease characteristics is where this essay breaks down. Those don’t really line up with any medical definition of disease. Seems like he redefines disease in order to deconstruct it a bit.