Fears of the Ebola virus have deepened with word that a second US nurse caught the disease from a patient and flew across the Midwest aboard an airliner the day before she was diagnosed.

A man who stabbed and injured two people on a US tour bus has been shot dead by police.

US health officials are alerting airline passengers who were on the same flight as a Texas nurse who was diagnosed with Ebola the following day.

A second US health care worker has tested positive for Ebola, Texas officials have revealed.

A Liberian Ebola patient was left in an open area of a Dallas hospital for hours, the largest US nurses’ union has said.

A World Health Organisation official said the death rate in the ebola outbreak has increased to 70%.

A US nurse who caught Ebola while treating a Liberian patient who died of the disease has received a plasma transfusion donated by a doctor who beat the virus.