14 October 2014 Last updated at 06:54 ET
The Ebola patient was being treated at St Georg hospital in Leipzig
A United Nations medical worker infected with Ebola has died at a hospital in Germany. Doctors at the hospital in Leipzig said the man, 56, originally from Sudan, died despite receiving experimental drugs to treat the virus.
The outbreak has killed more than 4,000 people since March - mostly in Liberia, Sierra Leone, Guinea and Nigeria.
The World Health Organization says the outbreak is the "the most severe, acute health emergency in modern times".
The man had been working as a UN medical official in Liberia - one of the worst affected countries - when he caught Ebola.
He arrived in Germany last Thursday for treatment and was put into a hermetically sealed ward, accessed through airlock systems.
"Despite intensive medical measures and maximum efforts by the medical team, the 56-year-old UN employee succumbed to the serious infectious disease," a statement from St Georg hospital said.
He was the second member of the UN team in Liberia to die from the virus, the BBC's Jenny Hill in Berlin says.
He was the third Ebola patient to be treated for the deadly virus in Germany after contracting the disease in the outbreak zone in West Africa.
Front-line health workers are at high risk of contamination
The World Health Organisation (WHO) says it is alarmed by the number of health workers who have been exposed to the disease.
The WHO has warned the epidemic threatens the "very survival" of societies and could lead to failed states.
Note: figures have occasionally been revised down as suspected or probable cases are found to be unrelated to Ebola. They do not include one death in the US recorded on 8 October.
http://www.bbc.com/news/world-europe-29611713