<http://schema.org/description>
"(Medical Xpress)\u2014From the several pandemics generally called 'pestilences' three are historically recognized as due to plague, but only for the third pandemic of the 19th-21st centuries AD there were microbiological evidences that the causing agent was the bacterium Yersinia pestis."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2013-05-scientists-justinianic-plague-bacterium-yersinia.html>