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美国已于1977年11月批准使用预防肺炎球菌疾病的14价肺炎球菌多糖菌苗。迄今,仅在美国已接种了400万人份剂量以上,除少数人外,所有接受此种菌苗的人都能很好
The United States approved the use of a 14-valent pneumococcal polysaccharide vaccine against pneumococcal disease in November 1977. To date, only 4 million people have been vaccinated in the United States, with the exception of a few people who are well tolerated