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Injections are no fun, regardless of what some might say, but that could soon change with the invention of the painless 'microneedle', a device that works much in the same way as the needle of mosquitoes while sucking blood. In the case of the aforementioned insects, the whole process consists of blood being drawn into the mouthparts of the mosquito as the muscles of its proboscis flex and relax thus creating negative pressure. The biocompatible microneedle is about 60 microns acros... Read »