Marburg virus outbreaks can have high fatality rates, killing up to 88 percent of those infected, according to the World Health Organization.

For the first time in Rwanda’s history, its health ministry is dealing with an outbreak of Marburg virus disease, a rare but deadly hemorrhagic disease similar to Ebola – but unlike Ebola, there is no treatment or vaccines for Marburg,

Rwanda says that eight people have died so far from the highly contagious Marburg virus. The announcement comes just days after the country declared an outbreak of the deadly hemorrhagic fever that has no authorized vaccine or treatment.