“As polio spreads across the war zones of Syria and Somalia, and stalks the Horn of Africa, our great opportunity to rid the world of another debilitating disease since smallpox is being thwarted,” Geert Cappelaere, UNICEF’s representative to Sudan, writes in the Bill & Melinda Gates Foundation’s “Impatient Optimists” blog. He examines a national campaign to vaccinate children in the conflict zones of Blue Nile and South Kordofan in southeastern Sudan, and writes, “We cannot let conflict stop us. We are ready with the vaccines, the equipment, the people and the resolve to reach each one of those children” (11/21).