More than 800,000 children lack access to routine immunisation in six northern states due to the activities of terrorist, locally dubbed as bandits, the Executive Director of National Primary Health Care Development Agency, Dr Faisal Shauib, has said. He named the six northern states as Kaduna, Niger, Zamfara, Kebbi, Katsina, and Sokoto, saying they were never reached for any routine immunisation due to banditry and other forms of insecurities.