In what ways did the new system of government fulfill the nation's need for a stronger central government and at the same time allay its fear of a government having too much power

The new system consisted of two kinds of power which was the state and national power which meant that there was a division of power which ensured that the government does not hold 100% power. This creates fair rights between the central government and the state. Both had their own specific rights and tasks where both cannot overlap each other. 

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.