Health: Asthma link to small families
Monday 26 January 1998
The European Respiratory Society study, based at the Institut Municipal d'Investigacion Medica in Barcelona, examined the risk factors for asthma in 2,646 adults, aged 20 to 44, in five areas of Spain.
Dr Jordi Sunyer, who led the research, said: "These findings suggest that a child with more siblings is exposed to a greater number of environmental factors which may strengthen their immune system."
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