Due to the differences in iodine side effect , contraindication , crowd ' s sensitivity , iodine supplies , ect . , various countries have very big difference in plan and implementation of iodine prophylaxis 由于碘的副作用、禁忌證、人群的敏感性、碘缺乏地區(qū)與非缺乏地區(qū)的差異等原因,各國在碘預(yù)防的計劃和實(shí)施上存在很大的差異。