Rwandan health authorities will begin a vaccine study against the Marburg hemorrhagic fever as the East African country tries to stop the spread of an outbreak that has killed 12 people.

Government to prioritise those ‘most at risk’ and ‘most exposed healthcare workers’ following the deaths of 12 people.

Marburg has caused small, episodic outbreaks since first being identified, most recently last year in Tanzania and Ghana. It is one of the deadliest known viruses, with no approved vaccines or specific treatments.