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Hay fever has been described as a "post industrial epidemic, "' and successive morbidity from British general practice suggest that its has continued to increase over the past 30. ) Other evidence suggests a recent increase in the of asthma2 and childhood eczema. 3 This suggests a possible explanation for these trends time.
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David P. Strachan
Preventive Cardiology
BMJ
London School of Hygiene & Tropical Medicine
University of London
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David P. Strachan (Sat,) studied this question.
synapsesocial.com/papers/69dbda8ef7e0c66ced8367b8 — DOI: https://doi.org/10.1136/bmj.299.6710.1259