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Professor Don Milton, director of the Maryland Institute for Applied... NyhetsfotoCollege Park,Horisontell,Hälsovård och medicin,Livsstil,Maryland - Delstat,Maryland universitet,Maskineri,Professor,USA,University of Maryland - College ParkPhotographer Collection: Tribune News Service 2013 MCTProfessor Don Milton, director of the Maryland Institute for Applied Environmental Health in the School of Public Health at the University of Maryland at College Park, at left, demonstrates the G2 machine, January 15, 2013. Research associate, Jovan Pantelic, seated at right, shows how a volunteer with early flu symptoms would be seated with his face in the metal cone to capture exhaled droplets. These are collected by the machinery for analysis in the lab. (Amy Davis/Baltimore Sun/MCT via Getty Images)