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1974年7、8月份在孟加拉国际腹泻疾病研究中心Mstlab地区进行了霍乱类毒素的保护作用的现场研究。儿童及15岁以上的未孕妇女接受了用无针注射器肌肉注射的霍乱类毒素或磷酸铝吸附的破伤风—白喉类毒
In July and August 1974, a field study of the protective effect of cholera toxoid was conducted in the Mstlab area of the International Center for Diarrheal Diseases in Bangladesh. Children and unidentified women over the age of 15 received either cholera toxoid intramuscularly with a needle-free syringe or tetraploid-diphtheria toxoid adsorbed on aluminum phosphate