The 23-valent pneumococcal polysaccharide vaccine is effective in elderly adults over 75 years old--Taiwan's PPV vaccination program.
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Cheng-Ta Yang | Yhu-Chering Huang | Y. Wen | Chee-Jen Chang | Y. Tsai | Chung-Chi Huang | M. Hsieh | Y. Chao | Han-Chung Hu