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July 4, 2014 9:20 AM EDT

There’s a little bit of good news for backyard barbecuers this summer—that frightening new virus called chikungunya is not likely to get you. But West Nile virus just might.

Chikungunya has been making headlines because it’s spread rapidly across the Caribbean and Central America in just half a year, infecting 260,000 people and killing 21. But a recent study suggests the United States has a bit of time on its side…

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