
Needle sharing is the practice of intravenous drug-users by which a syringe is shared by multiple individuals to administer intravenous drugs, and is a primary vector for diseases which can be transmitted through blood (blood borne pathogens). From the years 1933 to 1943, addiction malaria was spread between users in the New York City area by this...
Found on
http://en.wikipedia.org/wiki/Needle_sharing

Usage of a single needle among two or more people for injecting drugs. Needle sharing is a high-risk behaviour for contracting infectious disease. ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
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