<http://schema.org/description>
"(Medical Xpress)\u2014Mathematicians are helping to build a better picture of how populations develop immunity to flu and which groups are most at risk of getting \u2013 and transmitting \u2013 infection each year."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2012-10-antigenic-center-age-specific-influenza-immunity.html>