Emergency vaccination campaign for yellow fever underway in Africa

An emergency vaccination campaign has started in Africa amid one of the largest yellow fever outbreaks in decades.

Residents in Congo and Angola will be given the jab first - it is hoped that 14 million people can be reached in more than 8,000 locations in total.

The World Health Organisation says more than 400 people have already died in this outbreak.

And are warning the disease could soon spread globally.