After hopeful signs of a decline in the number of new Ebola cases, Sierra Leone remains an area of concern.

Wednesday's weekly statistics released by the World Health Organization show transmission rates in the West African country are widespread, with eight districts reporting new cases since January.

Ebola Sierra Leone

Health workers push a wheeled stretcher holding a newly admitted Ebola patient outside Freetown, Sierra Leone in December 2014. New cases are rising again in the city. (Baz Ratner/Reuters)

Investigators are unable to establish how the disease is being transmitted.

Misinformation and rumours still plague the efforts of relief workers as there are still people who are unable or unwilling to seek treatment. Unsafe burials remain a priority.

In total, 99 new confirmed cases of Ebola were reported in the week to Feb. 22 in Guinea (35), Sierra Leone (63) and Liberia (1).