Ebola death toll rises to above 2,600

More than 2,600 people have now died from Ebola, the World Health Organisation said.

The organisation reported more than 5,000 cases across west Africa, describing the crisis as "unparalleled in modern times".

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Questions raised about experimental Ebola medicine

It is unknown whether the experimental treatments given to the US patients suffering from the Ebola virus were helpful or harmful, according to the director of the US Centers for Disease Control and Prevention (CDC).

In testimony to a special congressional hearing, Dr. Thomas Frieden said he was confident, "there will not be a large Ebola outbreak in the US," although he admitted that it was possible the people entering America could bring the virus with them.

He added that the organisation has more than 250 staff members working on the outbreak, but it was unknown whether the experimental treatments given to the US patients suffering from the Ebola virus was helpful or harmful.

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