France, June 15 -- Despite a massive scale-up in the response to the deadly outbreak declared in the vast central African country, the medical charity MSF (Doctors without Borders), said the true scale of the crisis remained unclear.

This strain is centred on the DRC's northeastern Ituri province, with cases also detected in North and South Kivu provinces.

"One month on, the Ebola disease outbreak is outpacing the response effort," Kate White, MSF's emergency medical coordinator in the DRC, said in a statement on Monday. "No-one knows the true scale or exactly where the disease is spreading," she added.

In Bunia, the capital of Ituri, young men are constantly digging new graves, RFI's special envoy reported. Janvier Sambabocu, the depu...