Liberian President Ellen Johnson Sirleaf told global financial and aid leaders in Washington that the sum is admittedly high, but crucial to help Guinea, Liberia and Sierra Leone recover after the devastating epidemic last year.
She said the sum would allow the three countries, who with Ivory Coast form the Mano River Union development region, to reach a more sustainable growth level and build health systems that would prevent another such outbreak.
Of the sum, USD 4 billion would be deployed over two years to help restore communities devastated by the outbreak, which left more than 10,000 dead.
It would also aim to restore medium- and long-term confidence among investors, after many pulled out of the countries hit by the epidemic.
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With new Ebola cases sharply down, but not entirely eradicated, leaders of the three nations said more money was needed urgently, even before a planned UN donor conference in July.
"We need these funds immediately, we don't want to wait until July."
At the meeting, World Bank President Jim Yong Kim announced a new USD 650 million in funds for the three countries, in addition to USD 1 billion committed last year to fight the outbreak.
Kim stressed even if new infections and deaths have declined dramatically, the three countries need support to ensure it does not return.
"The epidemic is not over. The world must not let up.