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Published online 18 September 2003 | Nature | doi:10.1038/news030915-9

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West Nile epidemic grows

Densely populated, mosquito-rich Califoria could be next for virus.

The West Nile virus (WNV) epidemic is growing as it continues its march westwards across the United States, public-health experts announced yesterday.

Next year's situation could be worse still, they warned.

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