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- W2365672312 abstract "Objective To survey the PPD positive rate after BCG vaccination in urban and rural children in Qingdao and to provide statistical basis for better prevention against tuberculosis. Methods An investigation was conducted in 2 653 urban children(3 months to 5 years old) and 589 rural ones(1 to 5 years) for the BCG scar and PPD positive rate. Results Among the urban children, the PPD positive rate of 3 to 12-month-old with BCG scar and of 1 to 5-year-old was 71.3% and 37.0% ,respectively. The rate was 24.8% in the rural children. The PPD positive rate in the urban children was significantly higher than that in the rural ones (χ 2=20.82,P0.001). Conclusion The quality of BCG vaccination in Qingdao is to be improved, rural areas in particular." @default.
- W2365672312 created "2016-06-24" @default.
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- W2365672312 date "2004-01-01" @default.
- W2365672312 modified "2023-09-27" @default.
- W2365672312 title "A SURVEY OF PPD POSITIVE RATE AFTER BCG VACCINATION IN URBAN AND RURAL CHILDREN IN QINGDAO" @default.
- W2365672312 hasPublicationYear "2004" @default.
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