1914: world war i begins.1917: charles schenck distributes pamphlets encouraging u. s. men to resist serving in the military.1919: the supreme court rules that schenck's action is not protected because it poses a "clear and present danger" to safety. what circumstance limiting freedom of speech is reflected in this timeline?

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.