Ebola and 'Contact Tracing'
Air Date: Aug 01, 2014 12:00 AM ET
Officials in Nigeria are scrambling to identify and locate people who may have come in contact with a carrier of the Ebola virus. The method they are relying on is called 'Contact Tracing'. Infectious Disease expert David Heymann explains.
Top News Headlines
The princes open up about their final conversation with their mother in a documentary coinciding with the 20th anniversary of Diana's death.