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By MARGIE MASON
AP Medical Writer
MEXICO CITY (AP) - Bird flu kills more than 60 percent of its human victims, but doesn't easily pass from person to person. Swine flu can be spread with a sneeze or handshake, but kills only a small fraction of the people it infects.
So what happens if they mix?
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Source: http://www.wtop.com/index.php?nid=345&sid=1671664 
