The East African country continues to investigate the source of the outbreak, first traced among patients in health facilities.

Rwanda’s first recorded infections of the Marburg virus, an Ebola-like hemorrhagic fever, is another sign that outbreaks of dangerous animal-borne diseases will become more frequent in an increasingly connected world,

Marburg virus disease has killed 11 people and sickened 25 others in Rwanda, which declared an outbreak on Sept. 27.