West Nile fever is found in at least one region of the Earth.
== Prognosis ==While the general prognosis is favorable, current studies indicate that West Nile Fever can often be more severe than previously recognized, with studies of various recent outbreaks indicating that it may take as long as 60 to 90 days to recover
West Nile virus encephalitis (WNE) is the most common neuroinvasive manifestation of WNND

