What happens in a primary election for a local office, such as the mayor of a city? Each political party selects their candidate for the general election based on how citizens have voted.

The top three candidates are chosen for the general election, regardless of political party.

The mayor is chosen after citizens vote, but citizens can only vote for candidates from their political party.

Each citizen votes for one top candidate from each political party.

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.