The first batch of an experimental vaccine against Ebola is on its way to Liberia.
The shipment will be the first potentially preventative medicine to reach one of the hardest hit countries.
But experts say that, with Ebola cases falling, it may be difficult to establish whether the jab offers any protection against the virus.
It has been produced by British company GlaxoSmithKline and the US National Institutes of Health, BBC informs.
