“…The second process begins with the development of a disease within the urban ghetto environment, a low income urban community situated in the center of a potential epidemic region, followed by a hierarchical diffusion process (Figure 7). For both Asiatic cholera and dysentery, an important sociological and human geographical interpretation of disease models has paid particular attention to income status as one of the most important role in understanding the disease diffusion process (Eyles and Woods 1983, Meade, Florin, and Gesler 1988, Earickson et al 1989, Jones and Moon 1991, Gesler and Ricketts 1992, Keams 1993, Keams and Gesler 1998 This link between social cohesion and epidemic disease behaviors is not new and has been heavily promoted during the past decades by Wilkinson (1973Wilkinson ( , 1986Wilkinson ( , 1994Wilkinson ( , 1996 …”