Explained: Ebola cases in Congo top 3,200, nearing record of the country's worst outbreak

Confirmed cases in Congo's Ebola outbreak have reached 3,262, per the Ministry of Health

Bundibugyo virus

A strain of Ebola virus responsible for the current outbreak, for which there are no approved vaccines or treatments

patient zero

The first identified case in an outbreak, used to trace its origin and spread

CDC

U.S. Centers for Disease Control, a public health agency cited for outbreak data