Overcoming an outbreak of one of the deadliest diseases on the planet is a complicated prospect at the best of times.

But imagine how you would go about it in a place where there’s frequent fighting that prevents you from reaching some of the sick and dying.

That’s what’s facing the World Health Organization (WHO), which has 300 workers on the ground helping 800 national staff fight the epidemic in eastern Democratic Republic of the Congo, which has seen more than 270 deaths so far.

Tarik Jasarevic of WHO, told UN News’s Daniel Johnson, he was “still confident” this latest outbreak will be contained, despite a host of “negative” factors.