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Human exposure to hazardous substances in the environment has been known to play an important role in the pathogenesis of some diseases. Photocopying machines have become a cheap source of self-employment in Nigeria. For obvious reasons the highest level of patronage is encountered in the campuses of educational institutions. However, the persons who operate the machines are always exposed to possible hazards associated with the job without protective devices.

Polycyclic Aromatic Hydrocarbon, Haematological and Oxidative Stress Levels in Commercial Photocopier Operators In Lagos, Nigeria