Amid reports of a deadly viral outbreak in Central Africa, researchers are reportedly scrambling to develop treatments and vaccines to combat Marburg virus.

Rwandan health authorities are struggling to contain the outbreak of the deadly Marburg virus, which has claimed the lives of about a dozen people. Health Minister Sabin Nsanzimana said those infected are mostly healthcare workers who are usually the first responders.

While outbreaks of Marburg virus are rare, there have been several in recent years across sub-Saharan Africa. It's one of the deadliest viral diseases and can be fatal. Here's what you need to know.