Unlike great britain and many other nations, the united states does not have an church that is officially supported by the government and recognized as a national institution.

The correct answer should be something like established

That is because the first amendment has the "anti establishment" clause where it is prohibited for the church to establish any church, which means that the government or the country can never give tax-payer money to fund churches or choose which church is the official one or anything similar because all people in America are equal regardless of religion.

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.