Members of Doctors Without Borders (MSF) put on protective gear at the isolation ward of the Donka Hospital in Guinea's capital Conakry on July 23, 2014 during the Ebola outbreakMembers of Doctors Without Borders (MSF) put on protective gear at the isolation ward of the Donka Hospital in Guinea's capital Conakry on July 23, 2014 during the Ebola outbreak (AFP Photo/Cellou Binani)
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Geneva (AFP) - The death toll in West Africa's Ebola outbreak has risen to 660, with the number of cases surpassing 1,000, the World Health Organization said Friday.
WHO spokesman Paul Garwood said that the extent of what is the deadliest outbreak of Ebola on record was still emerging.
"This is a trend, an overall picture. It's hard to get an exact picture on the scale of the situation at the moment," he told reporters.
The UN health agency said 28 news deaths were recorded between July 18 and July 20. Thirteen were in Sierra Leone, 11 in Liberia and four in Guinea, which had previously borne the brunt.
Forty-five new cases were recorded over the same period, in West Africa's first-ever Ebola outbreak.
That lifted the total number of laboratory-confirmed, probable or suspected cases of Ebola in the region to 1,093.
Although Guinea recorded the lowest number of new cases -- five -- it is still has the highest death toll.
In total, Guinea has seen 314 fatalities and 415 cases and since the outbreak began in January.
Sierra Leone's case-count has now overtaken Guinea's, however. It reported 12 new cases, taking its total to 454, with 219 deaths.
Liberia reported 28 new cases, lifting its total to 224. Of those, 127 have been fatal.
"We're providing additional support to hospitals and clinics, and we're seeing that many of these facilities simply don't have enough people to provide the constant level of care needed," said Garwood.
"We're working together with our partners to do our best on the ground to control the outbreak," he added.
Ebola is a form of haemorrhagic fever which can have a 90-percent fatality rate.
It can fell victims within days, causing severe fever and muscle pain, vomiting and diarrhoea -- and in some cases, organ failure and unstoppable bleeding.
It is believed to be carried by animals hunted for meat, notably bats.
It spreads among humans via bodily fluids including sweat, meaning you can get sick from simply touching an infected person. With no vaccine, patients believed to have caught the virus must be isolated to prevent further contagion.
The WHO, local medical services and international charities have been working flat-out to discourage communities from continuing funeral rights that involve touching dead bodies.
Ebola first emerged in 1976 in what is now the Democratic Republic of Congo, and is named after a river there.