<http://schema.org/alternativeHeadline>
"Unvaccinated childre may cluster together, resulting in a sustained ongoing transmission of diseases like measles or chicken pox."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/kids-vaccine-rates-for-measles-need-to-improve-says-cdc>