West Africa seeks to seal off Ebola-hit regions
West Africa's Ebola-hit nations have agreed to impose a cross-border isolation zone at the epicentre of the world's worst-ever outbreak, amid warnings that the deadly epidemic is spiralling out of control.
Kent Brantly, a doctor who was treating Ebola patients in Liberia, and Christian missionary worker Nancy Writebol, were being flown home, but it was not immediately clear when they would arrive back in the US.
Meanwhile Nigeria quarantined two people who had "primary contact" with a man who died of Ebola in Lagos last week.
The WHO raised the death toll by 57 to 729 on Thursday, announcing that 122 new cases had been detected between Thursday and Sunday last week, bringing the total to more than 1,300.
"Current numbers of national and international response staff are woefully inadequate," Chan said, revealing that 60 health workers had died treating patients in the outbreak.
Read: Ebola moving faster than control efforts, says WHO; toll reaches 729
State of emergency
Sierra Leone's leader Ernest Bai Koroma has announced a state of emergency, quarantining Ebola-hit areas and cancelling foreign trips by ministers, while Liberia has closed all of its schools and put government workers on leave.
Liberian President Ellen Johnson Sirleaf warned ahead of the summit that the crisis was "nearing a catastrophe" and appealed for more doctors and supplies.
Ebola, which has no vaccine, causes severe muscular pain, fever, headaches and, in the worst cases, unstoppable bleeding.
It has killed around two-thirds of those it has infected since its emergence in 1976, with two outbreaks registering fatality rates approaching 90%.

The death rate in the current outbreak is a lower-than-average 55 percent.
Fears that it could spread to other continents through air travel have been growing, with European and Asian countries on alert alongside African countries outside the Ebola crisis zone.
In Britain, Sierra Leone cyclist Moses Sesay was quarantined and tested for Ebola at the Commonwealth Games in Glasgow, before being given the all-clear, the athlete told a British newspaper.
Kenya, Ethiopia, Democratic Republic of Congo and Benin said they had enhanced screening at border points and airports.
Pan-African airlines Arik and ASKY have halted flights to and from Liberia and Sierra Leone, while Asia-Pacific nations from Hong Kong to Australia have announced tighter security measures at airports, some warning against travel to the Ebola-hit countries.
Watch video: US warns against traveling to Ebola-hit areas

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