碘是人体不可缺少的一种营养元素。碘缺乏病是世界上分布最广泛、侵犯人群最多的一种地方病。碘缺乏病不仅表现为甲状腺肿大、克汀病,直接导致怀孕妇女流产、早产、死产、胎儿先天畸形,使新生儿出现聋、哑、瘫、呆小等病症,最主要的危害是缺碘影响胎儿的大脑发育,导致儿童智力和体格发育障碍,造成碘缺乏地区人口的智能损害,严重危害人民群众身体健康,影响社会经济的发展与繁荣。 Iodine is an indispensable nutrient element of the human body. Iodine deficiency disease is the most widespread and most endemic endemic disease in the world. Iodine deficiency disease is not only manifested as goiter, cretinism, a direct result of miscarriage of pregnant women, premature birth, stillbirth, congenital malformations of the fetus, the newborn deaf, dumb, paralyzed, stay small and other diseases, the main harm is the lack of Iodine affects fetal brain development, resulting in mental retardation and physical development in children, resulting in intelligent damage to the population in iodine deficient areas, seriously endangering the health of the people and affecting the development and prosperity of the society and the economy.