West Nile's Spread Linked to Robin's Migration

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A new study suggests red-breasted robins may play a key role in the spread of West Nile Virus. The disease has killed nearly 800 people in the United States since it first arrived seven years ago. Mosquitoes that spread the virus appear to prefer meals of robins' blood in the summer, then switch to humans in the fall when the birds head south.

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Copyright NPR. View this article on npr.org.