| Pandemic alert raised to second-highest level - Read more
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| More than 100 U.S. schools closed - Read more
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| Swine flu cases mount - Read more
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| WHO fears pandemic is 'imminent' - Read more
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| World battles swine flu as death toll rises - Read more
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| Earliest case of swine flu tucked away in Mexico, officials say
- Read more
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| First U.S. swine flu death reported - Read more
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| Patient zero? Mom of first confirmed case talks - Read more
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| CDC: U.S. flu deaths likely as outbreak spreads - Read more
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| Mexico: Swine flu toll stabilizing - Read more
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| Mexicans deny swine flu origin - Read more
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| Why only deaths in Mexico? - Read more
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| Regular flu has killed thousands since January - Read more
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| U.S., others caution against Mexico travel - Read more
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