The CDC is closely monitoring an "unknown disease” that has killed dozens in the Democratic Republic of Congo, the agency said in a statement on Monday.

The outbreak has been traced, tentatively, to three children who ate a bat, the W.H.O. said, and known threats like Ebola and Marburg have been ruled out.

Is a new virus causing a disease outbreak and deaths in the Democratic Republic of Congo, or is the cause already known to science?

Reports of a large number of unexplained illnesses and deaths in Equateur province have garnered international attention, likely in part because this region of DRC has had several Ebola outbreaks in recent years.