Almost 600,000 Rohingya refugees have crossed into Bangladesh, fleeing the violence in Burma's Rakhine state, since August 25. Many of the refugees tell distressing stories of their villages being attacked or burned by Burmese soldiers, or of their neighbors or family members being injured or killed. The United Nations has accused Burmese troops of waging an ethnic cleansing campaign. The new arrivals in Bangladesh join an already-existing large population of Rohingya refugees, which has prompted the government to announce plans to build one of the world’s largest refugee camps to house more than 800,000 stateless Rohingya, replacing hundreds of makeshift camps that are popping up near the border. Local medical teams, supported by UNICEF and WHO, have started a massive immunization drive in the camps, racing to prevent outbreaks of infectious diseases. The UN Refugee Agency has called the current crisis the fastest-growing refugee emergency in the world today.