摘要
VA缺乏在世界尤其发展中国家学前儿中流行。全球有4000万/年儿童患VA缺乏症,我国20-50％的儿童VA不足或缺乏。VA缺乏成倍增加呼吸道,消化道疾病的发病率和死亡率,而感染又使体内VA更缺乏,故以VA辅助治疗可减轻症状,缩短病程,减少复发。
Vitamin A deficiency is a endemic disease among preschool children in the worhd especially developing counfry.Studies shou that 40 million children have vitamin A deficienty annually aronnd the world.In oircountry 20 - 50% of children hare vitamin A deficiency, infections even more cause organisn vitamin A deficiency, with which morbiity and morfality of respiratory and alimentary diseases were greatly increased. Therefor treatmentw ith vitamin A can reduce symptoms, course and relapse of the disease.
