sentences:  The Population of Port are watched constantly by a totalitarian government; there are class divides in the parishes (there is an underclass of Danish refugees living in many of the lower levels); the climate of Earth is now inhospitable.In addition to these problems, Senga, a new strain of HIV infects much of the population.There is no cure, and the entire population is infected with the Mowdy virus (similar to HIV) and are dependent on government issued medication to suppress Senga.