Nigeria has a yellow fever outbreak underway and an analysis of the official data on the number confirmed cases showed four states account for 80% of all cases in the country as at Christmas Day. According to a situation report published by the Nigeria Center for Disease Control (NCDC), the four states with the highest number of confirmed cases of yellow fever are Enugu, Delta, Benue and Bauchi. !function(){"use strict";window.addEventListener("message",(function(a){if(void 0!==a.data["datawrapper-height"])for(var e in a.data["datawrapper-height"]){var t=document.getElementById("datawrapper-chart-"+e)||document.querySelector("iframe[src*='"+e+"']");t&&(t.style.height=a.data["datawrapper-height"][e]+"px")}}))}(); According to the official data, out of the