美国确诊第二个埃博拉病例

A second health care worker at a Dallas hospital who provided care for the first Ebola patient diagnosed in the US has tested positive for the virus.

Authorities also say the victim, identified as Nurse Amber Joy Vinson, flew on a commercial flight from Ohio to Dallas the day before she started showing symptoms.

Thomas Frieden, director of US Centers for Disease Control and Prevention, says the chances that other passengers on the flight have become infected are very low, noting the nurse was not vomiting or bleeding.

Even so, the CDC is asking the roughly 130 passengers aboard the flight to call authorities so they can be monitored.

Meanwhile, US President Barack Obama has canceled a campaign trip to hold a Cabinet meeting about Ebola.

White House spokesperson Josh Earnest has also issued a response to the recent criticism of the US government's handling of the Ebola situation.

"People should continue to be confident in the responses organized by the government in reaction to the specific situation. The reason for that is simply that we have a modern, medical infrastructure in place that again, has not been flawless. We've pointed out why that was the case, that even one transmission to a health care worker is unacceptable."

On a global scale, the World Health Organization is continuing to warn of the potential of an exponential spreading of the virus.

WHO spokesperson Tarik Jasarevic.

"Well, what we have seen in the recent weeks and months is that the number of cases doubles every four weeks, so if we do not step up the response, if we let it go as it goes now, we could have anywhere between 5,000 and 10,000 cases per week in December. So this is something we do not want to see."

The Ebola virus has already left around 45-hundred dead among the roughly 9-thousand people infected with the virus.