WHO warns it is ‘chasing’ Ebola as death toll surpasses 1,900: ‘The virus is ahead of us’

Confirmed cases of Ebola in this outbreak have reached 4,200, including over 1,900 deaths, according to the latest government figures

The latest Ebola outbreak in the Democratic Republic of Congo began at least three months before it was officially declared - meaning the health authorities are still playing catch-up, the World Health Organization (WHO) has warned.

Infection rates are high, adding to concern that authorities are struggling to get to grips with the disease.