The rapidly-spreading virus has been declared a global health emergency in an effort to fast-track international action and research priorities.
Following harsh criticism of its handling of the Ebola outbreak last year, the organisation says it will up its game in dealing with future crises.
The WHO says two experimental vaccines could lead to trials being done in West Africa in January, while another flu drug is being tested as well.
Islamic militants released US journalist Peter Theo Curtis on Sunday, less than a week after grisly footage emerged of the execution of James Foley.
The World Health Organisation, which has been criticised for its response to Ebola, has revealed its strategy for halting the epidemic in West Africa.
The World Health Organisation declared the situation "serious" when new cases surfaced after officials thought they had contained the virus.
Mining firms have locked down operations in Guinea and pulled out some international staff as the death toll from suspected Ebola cases hit 83.
The first round of peace talks has ended with no progess made on ending the civil war or commitment from the govt to return to the negotiating table.
The US has demanded that Syria allow aid in to Homs, as peace talks over the future of President Bashar al-Assad continue.
UN aid agencies say heavy fighting has prevented health workers from getting polio vaccine to 100 000 Syrian children.