Rwandan Health Minister Sabin Nsanzimana told reporters Sunday that the Rwanda Biomedical Centre had reviewed the vaccine shipment.

Eleven people have died in Rwanda as the African country continues to fight an outbreak of Marburg virus. The Rwandan government said there were 36 confirmed cases of the virus in its latest update, with 25 people in isolation.

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.