Nearly two thirds of the total cases and almost all cases of meningitis due to staphylococcus, streptococcus, Hemophilus influenzae and gram-negative bacilli were below the age of one.

• 约2/3化脓性脑膜炎的病例及大部分的葡萄球菌，链球菌，流行感冒杆菌和格兰氏阴性菌脑膜炎发生在1岁以下。