WHO chief arrives in Congo to support Ebola response as cases near 4,000 The SpecWHO pleads for more support to tackle Ebola outbreak CTV NewsEbola kills more than 1,700 in eastern Congo in fastest-growing outbreak The Globe and MailEbola disease caused by Bundibugyo virus – Democratic Republic of the Congo World Health Organization (WHO)Fast-growing Ebola outbreak in DRC surges to second-largest on record CNN