The US has also sent construction supplies for 17 treatment units with 100 beds each, to be finished by the end of November.
The US, Britain and Australia are preparing new screenings for air passengers arriving from West Africa.
Passengers to the US from Liberia, Sierra Leone or Guinea are to be screened for fever using no-touch thermometers. British authorities also planned to use enhanced screening at Heathrow and Gatwick Airports, as well as Eurostar rail terminals.
And travellers arriving in Australia from West African countries will be interviewed and screened for symptoms. The Australian Health Department says the risk is low, as a Cairns nurse cleared of contracting the deadly virus is in hospital until at least tomorrow for further testing. Sue Ellen Kovack, 57, remains in isolation in Cairns Hospital.
The Red Cross worker recently returned from volunteering at hospitals in Sierra Leone and isolated herself at home on her return. She reported to authorities she had a low-grade fever, and was admitted to hospital on Thursday.
As worry ricochets around the globe, the UN is calling for nations to work together - and fast - or "the world will have to live with the Ebola virus forever".
The number of Ebola cases is probably doubling every three to four weeks, said UN special envoy on Ebola David Nabarro.
Without a mass mobilisation of nations and relief groups "it will be impossible to get this disease quickly under control".
The world's response needed to be 20 times greater than it was now, Nabarro said.
But questions are being asked about the US readiness for the disease, after medical records showed the Dallas hospital that initially missed the first US Ebola diagnosis put a Liberian man through a battery of tests and CT scans for appendicitis, stroke and other serious ailments before sending him home.
Before he was released, Thomas Eric Duncan's fever spiked to 39C he reported severe pain and told a nurse that he'd recently come from Africa.
But doctors didn't think of Ebola until he returned to the hospital two days later by ambulance. He on Wednesday and his remains have been cremated.
Josephus Weeks, Duncan's nephew, said his uncle's care was "either incompetence or negligence", adding it was "conspicuous" that all white Ebola patients in the US survived "and the one black man died".
Questions also linger about the readiness of the medical system in Spain, where a nursing assistant is sick with Ebola, which she apparently caught while treating a patient infected in West Africa. Unions and opposition politicians said the national health care system didn't give medical workers the proper training and protective gear.
The UN is focusing on Liberia, Sierra Leone and Guinea, where the virus is multiplying out of control.
The WHO said 4033 people had died from Ebola since October 8 out of 8399 registered cases in seven countries. The UN said aid pledges to fight the outbreak have fallen well short of the US$1billion ($1.2billion) needed.
UN Secretary-General Ban Ki-moon said resources to support the fight had to be increased 20-fold.
"Cases are growing exponentially," Ban said. "Do not wait for consultation. Just take action."
Meanwhile, a possible Ebola vaccine developed by the US government is being tested on up to 40 medical workers in Mali, which shares a border with Guinea. If safety tests go well, larger trials could be done in the outbreak zone early next year.
- AAP
