In response to an ongoing cVDPV2 outbreak, Cameroon held phase 1 of an oral polio vaccine campaign September 18-20, targeting 4 million children below age 5 in 117 health districts across Adamaoua, Center, East, Far North, Littoral and the North. Phase 2 will run October 9-11. Journal du Cameroun; Journal du Cameroun; GPEI