United States Ebola czar Ron Klain said the fight against Ebola is not over until the world is zero-free of cases, Huffington Post reported.

Quoting an interview with CBS 'Face The Nation' Klain stated, "this won't be done until we get all the way to zero. It's like a forest fire. A few embers burning and the thing can re-ignite at any time."

Last week, deaths from the Ebola outbreak are now over 7,000 and most hit by the deaths from the virus is Sierra Leone.

The WHO data showed that there are 7,373 deaths as of posting before Christmas.

United Nations Secretary General Ban Ki-moon had shared the same sentiment regarding combating the deadly disease.

"We have a long way to go. Zero cases in Liberia, and this entire region, must be everyone's goal," he was quoted as saying.

Klain on the other said that there are still cases in West Africa. "We're nearing a pivot point in this," Klain said.

Last week, the Center for Disease Control (CDC) disclosed that a technician is undergoing monitoring for possible exposure to the various in one of the labs.

The report said the technician would be monitored for 21 days, although he has not shown any symptoms.

Klain also told CBS that the Ebola vaccine developed is going to be released soon.

 Ebola hemorrhagic fever is a disease caused by one of five different Ebola viruses.

The first human outbreak was first reported in 1976, one in northern Zaire or now Congo in Central Africa: and the other, in southern Sudan.

It was called Ebola after the river when it was first recognized in 1976.

Symptoms are weakness, fever, aches, diarrhea, vomiting and stomach pain. Additional experiences include rash, red eyes, chest pain, throat soreness, difficulty breathing or swallowing and bleeding, according to the WHO website.