A second health worker in the US state of Texas has tested positive for Ebola, health officials say.

Both health workers treated Liberian man Thomas Duncan, who died last week after becoming the first person diagnosed with Ebola in the US.

Meanwhile, the UN's Ebola mission chief says the world is falling behind in the race to contain the virus.

The World Health Organization (WHO) says 4,447 people have died from the outbreak, mainly in West Africa.

Sierra Leone, Liberia and Guinea have been hardest hit by the outbreak, which began in December 2013 but was confirmed in March.

Anthony Banbury told a special session of the UN Security Council on Tuesday that if Ebola was not stopped now, the world would "face an entirely unprecedented situation for which we do not have a plan".

President Barack Obama is due to hold a video conference with British, French, German and Italian leaders to discuss the Ebola crisis later on Wednesday.

New measures

The identity of the second health worker has not yet been revealed, but officials said the person also cared for Mr Duncan while he was in hospital.

Last weekend, officials announced nurse Nina Pham, 26, had been exposed to Ebola at a Dallas hospital when she treated Mr Duncan.

Doctors at the Health Presbyterian hospital said she was in good condition on Tuesday.

The health worker was immediately isolated after reporting a fever on Tuesday, the Texas State Department for Health said in a statement.

"Health officials have interviewed the latest patient to quickly identify any contacts or potential exposures, and those people will be monitored," the department said.
(BBC)