Syria's war has caused a re-emergence of polio. As a result, the W.H.O. is instituting a campaign to vaccinate 50 million children in the region. The diaspora of refugees undoubtedly will spread the disease. Here is a NYTimes article about the WHO initiative:http://www.nytimes.com/2013/11/07/world/middleeast/who-escalates-polio-fight-in-reinfected-mideast.html?_r=0.