Governments, Competitors Cooperate to Produce Ebola Vaccine

The worst Ebola outbreak in history is in its second year, and scientists around the world are working to develop a vaccine against the virus. Since December of 2013, when the Ebola outbreak began in West Africa, the World Health Organization reports more than 20,000 people have been infected with the virus, and of those, more than 8,000 people have died. VOA's Carol Pearson reports on two vaccines that are being developed.