by Cathy Holding
RESEARCH ROUND-UP	Hygiene hypothesis questioned Email: Cathy Holding - cathyholding@aol.com News from The Scientist 2004, 5(1):20040217-01 Published   17 February 2004

A new study by a team at Stanford questions the controversial hygiene hypothesis, which states that raising children in an overly clean environment leads to the development of asthma. But others in the field say the paper, in the February 16 Nature Immunology, does little to challenge the theory.

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