Actually it never left. Ebola is endemic in the Democratic Republic of Congo. The government has declared an outbreak after 17 people in the town of Bikoro are suspected of dying of the gruesome disease. The WHO statement says:

All cases were reported from iIkoko Iponge health facility located about 30 kilometres from Bikoro. Health facilities in Bikoro have very limited functionality, and rely on international organizations to provide supplies that frequently stock out…We know that addressing this outbreak will require a comprehensive and coordinated response. WHO will work closely with health authorities and partners to support the national response.

According to BBC News, “this is the ninth time an Ebola outbreak has been recorded in the DR Congo. The virus was first discovered there in 1976 (when the country was known as Zaire) and is named after the Ebola river.”

Ebola is thought to be transmitted to humans via contact with infected animals such as the fruit bat, or eating infected bushmeat. However, it is worth noting that scientists aren’t exactly sure how Ebola is spread, at least initially, so let that thought fester. Once a person is infected, the virus can be spread through blood or body fluids or objects contaminated with body fluids.

The biggest outbreak of Ebola occurred in West Africa from roughly 2014 to 2016 and killed over 11,000 people. According to the CDC, “Many of these survivors suffer from persistent medical conditions after recovery from Ebola, including joint pain, eye problems, headaches, and other chronic health issues.”