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在近30年中,美国第二次批准使用多价肺炎球菌荚膜多糖菌苗以来,迄今已历时6年。自从肺炎球菌菌苗使用以来,有过许多争论,有不到四分之一的病人虽经菌苗免疫,但在感染后仍有较高的病死危险性。对青年
For the second time in nearly 30 years, the United States has ratified the use of multivalent pneumococcal capsular polysaccharide vaccine for six years. Since pneumococcal vaccines have been used, there have been many controversies. Less than a quarter of patients are immunized with the vaccine but still have a high risk of dying after infection. For young people