http://articles.mercola.com/sites/articles/archive/2000/07/09/tb-asthma.aspxLending more credence to the increasingly popular "hygiene hypothesis" of asthma and allergies is this report. To summarize: Study included 235,477 children 13 to 14 years old from 23 countries, including many European countries, the UnitedenCommunityServer 2008.5 SP1 (Build: 31106.3070)