Emerged as a distinct virus around 1000 years ago and first detected in the Western Hemisphere in 1999, the deadly West Nile virus has since rapidly spread across the North American continent into all 48 continental states, seven Canadian provinces, and...
Study: Genetic mutation makes West Nile virus more virulent
Made Popular Aug 13 2007
Emerged as a distinct virus around 1000 years ago and first detected in the Western Hemisphere in 1999, the deadly West Nile virus has since rapidly spread across the North American continent into all 48 continental states, seven Canadian provinces, and...
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