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Researchers at San Diego State University, California, swabbed fingers of 500 children around six years old. Three-fifths were from non-smoking homes, but 96 per cent of all kids had nicotine on their hands.
A new study, published by researchers at Cincinnati Children’s Hospital Medical Center, finds even children in "smoke-free" homes can still feel the effects of nicotine that has clung to walls and carpet for years.