The incidence of invasive pneumococcal disease (IPD) is reported to have decreased following introduction of the pneumococcal conjugate vaccine (PCV) for children. However, the detection rate of non-vaccine-serotype pneumococci appears to be gradually increasing. Herein, we report two rare cases of IPD caused by pneumococcal serotype 28F in Shizuoka Prefecture.
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AKUZAWA et al. (2026) studied this question.
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