The World Health organization is hot on the heels of an Ebola vaccine. The two most promising candidates are now being tested in humans. But there is still a possibility that the vaccines could fail.
The Red Cross' global head has said Ebola could take four to six months to contain, but only if all necessary steps are taken to stop the virus from spreading. Both the US and Rwanda have implemented new precautions.
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For over a century, scientists believed it was impossible to see viruses and single molecules with a microscope. But three researchers broke through this "physical limit" and are now Nobel Laureates.
Energy-saving light-emitting diodes have conquered the world. Diodes for red and green light have been on the market for 50 years. But blue was a huge challenge - until three Japanese physicists came along.
Men are said to be better than women at creating maps in their brains. But as the three winners of the 2014 Nobel Prize in Medicine show, even mice have brain cells for navigation.