Concord Hospital robot's pulsing purple light kills deadly germs

There’s a new member on the cleaning crew at Concord Hospital who never turns up her nose at a mess. She’s never squeamish, never sick, and hasn’t missed a day of work since starting last April. Rosie, a 3-foot-tall robot, cleans about 30 rooms every day with a pulsing purple light, killing stubborn bacteria


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