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Body & Brain

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false-color image of cells in minibrain

MIXED SIGNALS  Minibrains grown in the lab form nerve cells (red) prematurely and show signs of dying cells (green) when treated with a signaling molecule called LIF. This molecule pours out of embryonic cranial cells after infection with Zika virus, and could harm brain development.

People in a hospital

ON EDGE  A pregnant woman and her family wait at a health clinic in Loiza, Puerto Rico. The U.S. territory has been hit hard by Zika virus, and nearly 2,000 pregnant women have been confirmed as infected.

Culex mosquito

SPREADING NEWS  The controversial idea that a Culex mosquito (shown) can spread Zika is getting some reconsideration as new data are emerging from separate labs.

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