Fighting the 'enemy' Ebola - The race to develop a vaccine

There is no known cure or vaccine for Ebola, even though it is nearly 40 years since the virus first emerged.

But there are three vaccine trials under way, and some experimental drugs have already been used.

The BBC's David Shukman reports on the race to develop treatment for Ebola, which health officials are describing as ''the enemy''.

  • Health