<http://schema.org/alternativeHeadline>
"Research suggests that our germ-fearing lifestyles are increasing levels of asthma, allergy and other autoimmune diseases."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/early-exposure-to-bacteria-builds-immunity-study-finds>