Can someone please explain to me the cause of the sudden outbreak? The ebola virus doesn't seem to be that new. Here in an excerpt from a Patent dating back to

Can someone please explain to me the cause of the sudden outbreak? The ebola virus doesn't seem to be that new. Here in an excerpt from a Patent dating back to 2008: "The family Filoviridae consists of two genera, Marburgvirus and Ebolavirus, which have likely evolved from a common ancestor'. The genus Ebolavirus includes four species: Zaire, Sudan, Reston and Cote d'Ivoire (Ivory Coast) ebolaviruses, which have, with the exception of Reston and Cote d'Ivoire ebolaviruses, been associated with large hemorrhagic fever (HF) outbreaks in Africa with high case fatality (53-90%)2." http://www.google.com/patents/CA2741523A1?cl=en http://www.google.com/patents/CA2741523A1?cl=en