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This study analyzes the effectiveness of the BCG vaccine over two decades, from 1988 to 2009, with a focus on patient groups (n=31, n=25, n=25). The findings highlight the vaccine's role in tuberculosis prevention and its varying efficacy across different populations. This research is crucial for understanding BCG vaccine performance and guiding future immunization strategies.
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1. BCG?PPV????????-????????????? ??? ??
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2. 1988-2009????BCG???????????(n=31)
3. 1988-2009????BCG?????????(n=25)
4. 1988-2009????BCG????????? (n=25)