著者等观察了佝偻病患儿预防接种效果如下:1、昭和26年北海道中央乳儿院麻疹流行,46名乳儿中有42例患麻疹。其中36名已于感染前施以人血清20毫升预防注射,但结果19名佝偻病患儿全部感染发病,非佝偻病儿17名中有12例发病。3名佝偻病患儿死亡。在该院101名乳儿接种卡介苗后,6个月内转阳者佝偻病儿9例占22.5%。非佝偻病儿31名 The authors observed the effect of immunization against rickets in children as follows: 1. Measles prevalence in Central Hokkaido Central Breast Hospital in Showa 26; 42 of 46 infants had measles. Thirty-six of them had been given 20 ml of human serum for prevention before infection. However, all of the 19 rickets patients were infected, and 12 of 17 non-rickets children were affected. Three rickets children died. In the hospital of 101 infants after BCG vaccination, 6 months, Yang positive rickets in 9 cases accounted for 22.5%. Twenty-one non-smite sick children