European ministers are to meet today after coming under pressure to scale up their response to an Ebola epidemic that experts warn could become the "disaster of our generation". The meeting comes as aid agency Oxfam, which works in the two worst-hit countries, Liberia and Sierra Leone, issued a stark call for more troops, funding and medical staff to be sent urgently to the west African epicentre of the outbreak to help stem the loss of life. "There is a very strong political focus on this as the most immediate crisis facing us," a European diplomat said ahead of today's meeting in Luxembourg. Another EU diplomat said Britain, which has a navy ship bound for Sierra Leone laden with medical staff and supplies, hoped to "galvanise EU action on Ebola". "There is a real sense that this is a tipping point and we must get to grips with it now," said the diplomat. "If we can deal with it in the country, we don't have to deal with it at home." Liberian President Ellen Johnson-Sirleaf stoked pressure with an impassioned appeal to the world's nations to pitch in, saying the "time for talking or theorising is over". "This fight requires a commitment from every nation that has the capacity to help, whether that is with emergency funds, medical supplies or clinical expertise," she said. The worst-ever outbreak of the deadly virus has so far killed more than 4,500 people, mainly in Guinea, Liberia and Sierra Leone, but isolated cases have begun to appear in Europe and the United States. However, there is good news for Nigeria which is expected to be declared free from Ebola this week just three months after fears the virus could spread through the nation. Senegal was declared free of the disease on Friday. In Spain, doctors were waiting for tests to confirm if Spanish nurse Teresa Romero, 44, the first person to contract Ebola outside of Africa, had beaten the virus. She was in a critical state when diagnosed on October 6, but her position has since improved after hospital treatment. Oxfam chief executive Mark Goldring said the world was "in the eye of a storm" as the charity warned Ebola "could become the definitive humanitarian disaster of our generation". "Countries that have failed to commit troops, doctors and enough funding are in danger of costing lives," he said.