患儿,男,5月龄,从3月龄开始接种百白破联合疫苗(DPT),每次注射0·5ml(上海生物制品研究所生产),每月接种1针,按时接种第3针0·5ml。注射后第2d,患儿出现躯干、四肢皮肤皮下出血点,且进行性加剧。查体:躯干、四肢皮肤皮下出血点,压之不褪色,心肺无异常,肝脾肋下未触及。注射DPT Pediatric, male, 5-month-old rabbits were vaccinated with DPT at a dose of 0.5ml (Shanghai Institute of Biological Products) from the age of 3 months, with 1 needle per month and the 3rd needle on time 0 · 5ml. On the 2nd day after injection, the child developed torso and extremities skin subcutaneous bleeding points, and the progressive increase. Physical examination: torso, limbs, skin subcutaneous bleeding point, the pressure does not fade, no abnormal heart and lung, liver and spleen ribs did not touch. Inject DPT