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Published January 03, 2011, 12:00 AM

Researcher near blood test machine

A researcher works near a blood test machine recently developed which is so sensitive it can spot a singe cancer cell lurking among a billion healthy ones during a media availability in Boston, Monday afternoon, Jan. 3, 2011. (AP Photo/Stephan Savoia)
Read the article: Blood Test to Spot Cancer Gets Big Boost From J&J