This visualization shows the east to west spread of West Nile Virus across the continental United States from 1999 through 2002. The years are represented by different colors. This visualization was created in support of a story describing how NASA is assisting the CDC and EPA in tracking the spread of West Nile Virus. Note: Animation showing east to west progression of West Nile Virus. Animator: Greg Shirah (NASA/GSFC), Horace Mitchell (NASA/GSFC). Scientist: David Rogers (Oxford University), Bob Venezia (NASA/HQ). Platforms/Sensors/Data Sets: Terra/MODIS, CENSUS State Boundaries, US West Nile Virus Cases, Terra and Aqua/MODIS/Blue Marble: Next Generation.

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