Explain the concept of manifest destiny and how the concept affected american expansion.

Manifest destiny was a belief that many Americans had that we should expand and control the land between the atlantic ocean and the pacific ocean. they believed it was our destiny to control this land eventually people believed we should spread the idea of manifest destiny world wide

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.