OBJECTIVETo analyze the features of the suspect adverse events following immunization(AEFI) in Shenyang. To evaluatethe report quality of the Information Management System and the safety of vaccines. METHODS Descriptive epidemiological methodswere used to analyze the AEFI cases reported by AEFI information management system from 2010 to 2013. RESULT A total of 824 AEFI cases were reported in Shenyang from 2010 to 2013,including 824(93.3%)genneral reaction cases,36(4.1%) adverse reactioncases,23(2.6%)coincid...