Bill Gates, co-chair of the Bill & Melinda Gates Foundation, gave the Kick Polio Out of Africa (KPOA) campaign a boost Tuesday by signing the football which is traveling from Cape Town to Egypt ahead of the 2010 World Cup. During the ball’s epic journey through 22 polio-affected and high-risk countries, Rotary clubs throughout Africa are mobilizing the public for massive immunizations and raising awareness for polio eradication. Gates lauded Rotary’s efforts to help kick polio out the continent -- and eventually out of the world.