The World Bank has pledged $200 million to help contain the deadly Ebola virus reaping panic across west Africa, as Nigerian authorities say a doctor in Lagos has contracted the disease, the second case in the sprawling city. The confirmation that a fourth doctor in the region had developed Ebola came Monday as fear and anger about the dead being left unburied in Liberia's capital Monrovia brought protestors into the streets there. Meanwhile, Sierra Leone's president said that the regional epidemic threatened the "very essence" of the nation.