某男,2004年2月7日出生,足月顺产,出生后按常规免疫程序先后接种了卡介苗、乙型肝炎疫苗、口服脊髓灰质炎疫苗、百白破联合疫苗,均无异常反应。8月龄时接种A群脑膜炎球菌多糖疫苗,2周后出现局部红肿、硬结,自行口服头孢类抗生素好转。9月龄时接种麻疹减毒活疫苗后数日,局部出现 A man, born February 7, 2004, full-term spontaneous birth, after birth by routine immunization programs have vaccinated BCG, hepatitis B vaccine, oral polio vaccine, diphtheria combined vaccine, no abnormal reaction. A group of meningococcal polysaccharide vaccine was inoculated at 8 months of age. After 2 weeks, local redness and induration occurred. Oral cephalosporins were improved. A few days after the measles attenuated live vaccine was given at 9 months of age, it appeared locally