Meningitis and encephalitis. These are infections of the brain and spinal cord that are usually caused by bacteria or viruses.

脑膜炎和脑炎：这些是由细菌或病毒引起的脑部或脊髓的感染。

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The bacteria most often responsible for bacterial meningitis are common in the environment and can also be found in your nose and respiratory system without causing any harm.

导致脑膜炎的细菌是环境中常见的，它们常常可存在于您的鼻子及呼吸系统中，但不引起任何危害。

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Pneumococcal bacteria can cause pneumonia, meningitis, septicemia, otitis media and other diseases. There was high incidence of infants under 2 years of age and older people.

肺炎球菌可引起肺炎、脑膜炎、败血症、中耳炎等疾病，在2岁以下婴幼儿和老年人中发病率最高。

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Pneumococcal bacteria can cause pneumonia, meningitis, septicemia, otitis media and other diseases. There was high incidence of infants under 2 years of age and older people.

肺炎球菌可引起肺炎、脑膜炎、败血症、中耳炎等疾病，在2岁以下婴幼儿和老年人中发病率最高。

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