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Human viruses are like a fine chocolate truffle: It takes only one to get the full experience.

At least, that's what scientists thought a few days ago. Now a new study published Thursday is making researchers rethink how some viruses could infect animals.

A team at the U.S. Army Medical Research Institute of Infectious Diseases has found a mosquito virus that's broken up into pieces. And the mosquito needs to catch several of the pieces to get an infection.

Enormous trucks from all over the country are rolling down highways toward Baton Rouge, La.

When they get to town, their task is to clear neighborhoods where streets are lined with trash from last week's massive flood.

Baton Rouge contracted with DRC Emergency Services to handle disaster response when the floods began last week. It started out rescuing people in boats, and now that the boats are docked, trucks are coming in to handle the cleanup.

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The messaging service WhatsApp is changing its privacy policy for the first time since being bought by Facebook in 2014. The app will begin sharing some of its data and phone numbers with the social network. It will also start testing how businesses, too, can talk to its users, for instance by offering flight or shipping or banking notifications.

They've known each other for only a few months, but this love story between an Australian ultramarathoner and a Chinese stray dog has seen extraordinary highs and lows.

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