In Sierra Leone, the officials are on the lookout for first known inhabitant of the capital Freetown who tested positive for Ebola infection, after her relatives forcibly removed her from a city hospital.

As per health ministry spokesman Sidi Yahya Tunis, 32-year-old Saudatu Koroma, residing in the highly populated Wellington neighbourhood, was admitted to an isolation ward with her blood samples being analysed. The results of the medical test came on Thursday.

Going by the health ministry data and officials , lots of confirmed cases of Ebola are now unaccounted for in Sierra Leone, where the maximum number of cases have been verified in the country's east.

Meanwhile the killer Ebola virus has spread to Nigeria through a Liberian passenger on board the plane to the most populated continent in the country.

The 40-year-old Liberian man, believed to be employed with the finance ministry was suffering from high fever and even vomited on the plane before passing away in Nigeria.

According to the Nigerian health minister Onyebuchi Chukwu, this was reportedly the first confirmed case of deadly virus Ebola in Nigeria since the start of the current outbreak.

The lethal virus has already claimed the lives of 660 people across West Africa.

There is currently no treatment and vaccine to combat the deadly virus Ebola, the symptoms of which include diarrhea, vomiting and internal as well as external bleeding.

The virus has already spread to Guinea, Liberia and Sierra Leone, taking the number of patients infected to 1,093.