WHO declares Nigeria free of Ebola

The Ebola outbreak in Nigeria is offically over, the World Health Organization said Monday.

WHO announced that it had been 42 days since the last case of Ebola tested negative in the country — equal to twice the virus’s maximum 21-day incubation period. The statement makes Nigeria the second African country to end Ebola transmission after Senegal received the same declaration Friday.

“The outbreak in Nigeria has been contained,” WHO Country Director Rui Gama Vaz said at a news conference in Nigeria’s capital of Abuja. “But we must be clear that we only won a battle. The war will only end when West Africa is also declared free of Ebola.”

In total, Nigeria reported a total of 20 Ebola cases, including eight deaths from the disease. According to the CDC, Ebola spread to Nigeria after an ill traveler carrying the virus flew into the international airport in Lagos before being admitted to a private hospital with symptoms — potentially exposing 72 people at both locations.