US President Barack Obama has used his weekly address to reassure the American people that they should not panic about Ebola.

It comes as the British Prime Minister has hit out at EU leaders for failing to shoulder their share of the burden to help stop the deadly virus from spreading.

David Cameron is looking for all European countries to make a combined pledge of one billion euro.

Britain has committed £125m (around €158m) to its contribution - the second highest sum after the US. Downing Street said the total contribution from the EU is €500m.

More money is needed to train at least 2,000 workers to go out to the affected regions, Mr Cameron suggested - appealing also for a "duty of care package" to be established for any that contracted Ebola while working at a European-run or funded medical facility.

In his letter, the Prime Minister said: "The rapid spread of the disease and recent cases outside the West African region demonstrate the magnitude of the task at hand. The World Health Organisation forecast 20,000 cases in West Africa by November 2014. I believe that much more must be done."

Ebola has already claimed the lives of more than 4,500 people, the majority living in West Africa.

But President Obama is urging the American people not to over react: