Nigeria is now free of the Ebola virus, the World Health Organization officially declared on Monday.

The most populous country in Africa reported 20 cases and eight deaths before doctors were able to eradicate the disease, reports ABC News.

WHO called it a "spectacular success story that shows that Ebola can be contained."

Earlier this year, WHO confirmed that Nigeria had also eradicated guinea-worm disease after it became an epicenter of the disease, with more than 650 000 cases reported each year.

In Senegal, it had been 42 days on Friday since a single confirmed case of Ebola virus was recorded and all known contacts came under a monitoring program and finally tested negative, which led WHO to declare that country to be Ebola-free.

(READ the full story from WHO)