The head of the World Health Organization (WHO) said on Wednesday that the Ebola outbreak in the Democratic Republic of the Congo (DRC) is showing signs of progress – but significant challenges remain in testing, surveillance, vaccine development and building community trust.

The World Health Organization chief says Congo's Ebola outbreak had a head start but that testing is improving, even as violence plagues the region.

The World Health Organization says Congo's Ebola outbreak had a head start, but testing is improving