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

A 26-year-old female nurse is already receiving treatment after becoming infected by a Liberian man who died from the deadly virus last week, reports BBC.

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.