A wheelchair may not be the only option for people who cannot walk on their own. So-called wearable robots are becoming lighter and more portable. The devices won't replace wheelchairs, which are faster. None of the devices are speedy enough, for example, for a paralyzed person to walk across a street before the light changes, said Arun Jayaraman of the Rehabilitation Institute of Chicago, who is testing a number of similar devices.
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