This latest Ebola outbreak in Western Africa has already killed more than 700 people. Doctors there are struggling to contain the spread of the disease, which the World Health Organization says has a mortality rate near 90% with no known vaccine. David McKenzie reports from Sierra Leone where he described a sense of panic, but also a sense of fortitude.

Is it possible to stop someone with Ebola from getting on a plane and spreading the disease? Elizabeth Cohen takes a closer look at the precautions.