<http://schema.org/description>
"Using a unique data set spanning 40 years of dengue fever incidence in Thailand, an international team led by biostatistician Nicholas Reich at the University of Massachusetts Amherst has for the first time estimated from data that after an initial dengue infection, a person is protected from infection with other strains for between one and three years."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2013-07-team-immunization-strategies-dengue-fever.html>