婴儿晚发性维生素Ｋ缺乏症的群体预防课题协作组婴儿晚发性维生素Ｋ（简称Ｖｋ）缺乏出血症是婴儿期最常见的出血性疾病，以颅内出血多见，病死率和致残率高。此项研究旨在探讨本病的发病率和简单而有效的预防方法。对象：烟台市芝采区、福山区、开发区、栖霞县、牟平县１... Collective Prevention of Late-onset Vitamin K Deficiency in Infants Collaboration Group Infant delayed vitamin K (Vk) deficiency is the most common hemorrhagic disease in infancy, with frequent intracranial hemorrhage and high mortality and morbidity . This study aimed to explore the incidence of the disease and simple and effective prevention methods. Object: Yantai Zicai District, Fushan District, Development Zone, Qixia County, Muping County 1 ...