“ｂ型流感嗜血杆菌”是细菌的一种； 与一般所说的“流行性感冒” 完全不同，它是５岁以下幼儿细菌性感染的重要病源。一旦感染此细菌，除了引起一般的上呼吸道感染外，还可能引起脑膜炎、肺炎、败血症、中耳炎、会厌炎．关节炎等危及生命的重大疾病。其中肺炎是我国婴幼儿死 “Haemophilus influenzae type b” is a kind of bacteria; completely different from the so-called “influenza”, which is an important source of bacterial infection in children under 5 years of age. Infection with this bacterium can cause meningitis, pneumonia, septicemia, otitis media, epiglottitis, in addition to general upper respiratory tract infections. Arthritis and other life-threatening major diseases. Pneumonia is the death of infants in our country