central africa. it is part of a drive by the world health organization to contain an outbreak of the disease in conflict-hit, northeast nigeria. >> this contributes to one of the largest synchronized campaign. a total of 190,000 vaccinateors will be going door to door and we need to sin con nynchronize campaign and so the virus has nowhere to hide and we can end polio for good in africa. >> stay with cnn. we'll be right back. l up sound hi, i'm the internet. you've got mail! what did you think i'd look like? i'm wire-y. uh, i love stuff. give me more stuff. (singing) we're no strangers to love i love that! hey, i know a bunch of people who'd like that.