Biomedicine

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Ebola virus

UNLIKELY CANDIDATE  The antidepressant drug Zoloft and another approved medication might fight the Ebola virus (shown). 

Map of chikungunya outbreaks and mosquito ranges

GETTING AROUND  The chikungunya virus spreads via mosquitoes in tropical regions. Now it has found a way to hijack a second mosquito, posing a threat to people in Europe, North America and China. (See below for a detailed version of the map.)

microRNA and radiation

MOLECULAR GEIGER COUNTER  The abundance of small pieces of genetic material called microRNAs falls or rises in the blood of mice after radiation exposure. A lethal dose of 8 grays of radiation (red dots) produces a different pattern than a serious but survivable dose of 6.5 grays (black triangles).

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