"Similarly disastrous scenarios face the many millions of people currently displaced through war and conflict. The Middle East, for example, is the site of the largest since the Second World War, with massive numbers of refugees and internally displaced people as a result of the ongoing wars in countries such as Syria, Yemen, Libya, and Iraq. Most of these people live in or overcrowded urban spaces, and often lack the rudimentary typically associated with citizenship. The widespread prevalence of and other diseases (such as the reappearance of cholera in Yemen) make these displaced communities particularly susceptible to the virus itself."