How is the map about immigration, c.1860: (by momus) different from a typical map of the united states

The map replaces the names of states and major geographical areas with names that represent the Irish. This is because many Americans at the time feared the Irish immigrants will  overtake many cities with their culture. ( Please note you did not provide the image of the map, so I can only assume we are talking about the same one.) 

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.