Cost-effectiveness of pneumococcal vaccination strategies for the elderly in Korea.

PLoS One · 2017 · PMC5428995 · PMID 28498857

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a decreasing trendno p-value reported

Although age-specific incidence of IPD and NPP was derived from a multi-center catchment population-based study, a decreasing trend in pneumococcal disease due to herd immunity has not been observed over the period of study (2011–2014) [ 22 ].

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