自1987年起,美国在18月龄以上的儿童中,批准使用b型流感杆菌(Hib)结合菌苗,接种后大多数儿童有较强的防御嗜血性流感的能力,但亦有报道表明:在部分儿童中的接种是无效的,本文旨在探讨促使菌苗接种失败的种种因素。作者以23名居住在美国14个州,接种Hib PS-D(Hib荚膜多糖与白喉类毒素)结 Since 1987, the United States of America approved the use of Hib combined with the bacterin in children over the age of 18 months, most of whom have a strong ability to prevent the development of Haemophilus influenza after vaccination. However, it has also been reported that: Vaccination in some children is ineffective, and this article aims to explore the factors that have contributed to the failure of vaccination. The authors, 23 living in 14 U.S. states, were vaccinated with Hib PS-D (Hib capsular polysaccharide and diphtheria toxoid)