Australia, South America ?West Nile Virus. Are there continents in the world where cases are as yet unknown ?
CDC says .... West Nile virus has been described in Africa, Europe, the Middle East, west and central Asia, Oceania (subtype Kunjin), and most recently, North America.
That leaves South America, Australia, and ';east Asia'; (china and Japan) as not yet known to have it.
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