Congo’s health ministry told Reuters this week that malaria was the culprit: “The mystery has finally been solved. It’s a case of severe malaria in the form of a respiratory illness,” it said Tuesday in a statement, according to Reuters. The ministry did not respond to multiple inquiries from NBC News.

Haemorrhagic fever isn’t typically associated with parasite-caused malaria, meaning the outbreak may be caused by more than severe malaria, authorities said. View on euronews

A mystery illness found in a remote part of Congo has been officially identified as a severe form of malaria, which has sickened nearly 600 people and killed 143.