A Democratic Republic of Congo (DRC) Ministry of Health employee (R) administers a polio vaccination to a congolese child during the first day of a national polio mass immunisation campaign in Lubumbashi located in the southern part of the DRC on October 28, 2010. Fifteen countries in Africa are undertaking a mass polio immunisation campaign for 72 million children this week, the World Health Organisation said earlier in the week. Polio has spread again in recent years with cases imported from some of the four endemic nations in Asia and Africa, mainly Nigeria, in a setback to global attempts to eradicate the crippling and sometimes lethal disease. AFP PHOTO / GWENN DUBOURTHOUMIEU