Sierra Leone has declared a state of emergency and called in troops to quarantine Ebola victims, joining neighboring Liberia in imposing controls as the death toll from the outbreak of the virus hit 729 in West Africa.
The World Health Organization said it would launch a $100 million response plan on Friday during a meeting with the affected nations in Guinea. It was in urgent talks with donors and international agencies to send more medical staff and resources to the region, it said.
The WHO reported 57 new deaths in the four days to July 27 in Guinea, Liberia, Sierra Leone and Nigeria.
"The scale of the Ebola outbreak, and the persistent threat it poses, requires WHO and Guinea, Liberia and Sierra Leone to take the response to a new level, and this will require increased resources," WHO Director General Margaret Chan said.
Sierra Leone President Ernest Bai Korom announced a series of emergency measures, to initially last 60 to 90 days, in a speech on Wednesday night.