With his staff in hand and the firm voice of someone on a mission, Reverend Manuel Miranda, leader of the Prophetic Union of Angels Church in Camama, Luanda, addresses a group of parents who are sceptical about the new polio vaccination campaign. "Reverend, we don’t understand the reason for yet another campaign. Won’t so many vaccines harm our children?” Ask one of the parents. Calmly, the pastor replies: “The vaccine is protection, not a threat.