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Sean Seege, left, and Mike Duclos seal a room as disinfecting... News PhotoBaltimore - Maryland,Disinfection,Filling,Healthcare And Medicine,Horizontal,Hydrogen,Maryland - State,Robot,USAPhotographer Collection: Tribune News Service 2013 MCTSean Seege, left, and Mike Duclos seal a room as disinfecting 'robots,' vaporize hydrogen peroxide to fill sealed rooms and disinfect all sufaces at Johns Hopkins hospital in Baltimore, Maryland, on December 26, 2012. (Algerina Perna/Baltimore Sun/MCT via Getty Images)