CRI听力:First Human Trials of Ebola Vaccine to Start in U.S.

US health authorities have announced plans to start testing an experimental vaccine on humans for Ebola.

20 healthy adults between the ages of 18 and 50 are to be vaccinated.

The U.S. National Institute of Health says it is also considering a trial of the vaccine in Nigeria, which has confirmed its 6th Ebola death this week.

Meanwhile, the World Health Organization has laid out new plans to try to contain the Ebola virus within the next 6 to 9 months.

Doctor Bruce Aylward is the assistant Director-General for Emergency Operations at the WHO.

"Going forward this is going to cost, we estimate, 489 million (US) dollars over the next six months. It is a big operation. We are talking, well over 12,000 people operating over multiple geographies in very, very difficult and high risk circumstances, it is expensive."

So far, Ebola has killed over 15-hundred people in western Africa.

Liberia has been hardest-hit of the four affected countries, with 624 deaths.

Psaki insists that U.S. surveillance flights are transparent and the U.S. has informed China about its plans.

But Chinese Defense Ministry Spokesperson Yang Yujun said the U.S. has never informed China about its close-in surveillance flights. He insists that even if there is transparency, it is not justification for such reconnaissance flights.

"If a behavior is wrong, whether it is transparent, or whether the government informs other countries, it is wrong."

The two militaries are meeting in Washington this week to discuss standards of behavior for air and maritime activities.

For CRI, I'm Su Yi.