Approximately 300,000 children under five in Kayin State, Mon State and Bago Region were reached with two rounds of polio vaccination during second and third week of July after an outbreak of vaccine-derived polio virus in Hpa-pun township, Kayin State. UNICEF supported the outbreak response with immunization, epidemiological & social investigation, planning, monitoring and implementation assistance especially in hard to reach & inaccessible areas of 12 townships.