West Nile's Spread Worries Experts The CDC says the West Nile virus is spreading much more rapidly this year than it did in 2002. Cases of West Nile fever have more than tripled since July. Colorado grapples with an outbreak of the disease, and California health officials expect the virus to arrive there by fall. Hear NPR's John Nielsen.
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West Nile's Spread Worries Experts

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West Nile's Spread Worries Experts

West Nile's Spread Worries Experts

West Nile's Spread Worries Experts

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  • <iframe src="https://www.npr.org/player/embed/1392681/1392682" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

The CDC says the West Nile virus is spreading much more rapidly this year than it did in 2002. Cases of West Nile fever have more than tripled since July. Colorado grapples with an outbreak of the disease, and California health officials expect the virus to arrive there by fall. Hear NPR's John Nielsen.