An animal linked outbreak of the Ebola virus in humans in Mbandaka, a city over more than one million people, threatens to spread to the capital Kinshasa through transportation links.

The first death occurred last week, and the WHO is sending vaccines from Goma to Mbandaka, although only about 200 doses. Well over 233 contacts have been exposed and are being monitored, meaning that the potential for spread is serious.

This represents the 14th outbreak in the country, and officials are confident that the spread can be contained with the rVSV live-attenuated virus, which some estimate to be 100% effective at preventing infection, though supply may be an issue. There are currently three primary vaccines available for the prevention of Ebola.