A medical team from Doctors without Borders heads into an Ebola treatment center in Sierra Leone.
For as many as 90 percent of those who contract it, Ebola is a death sentence.
More than 700 people in four African countries, have died in the latest outbreak.
There is no known cure for the disease. It's caused by a virus which spreads from person to person through bodily contact.
For health care professionals, like Max Gertler from Doctors without Borders, treatment of Ebola presents significant challenges.
(SOUNDBITE) (English) MEDECINS SANS FRONTIÈRES DOCTOR MAX GERTLER [WHAT MAKES EBOLA SO DIFFICULT TO TREAT] SAYING:
"First of all the fear. Which one has to overcome. And there is of course the risk to get infected yourself."
For leaders of those nations affected, the crisis has triggered a national emergency. They're now meeting in Guinea to craft a response.
Although the World Health Organization says that for now, the outbreak is mov