Efficacy of the BCG revaccination programme in Hong Kong.
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D001500:BCG Vaccine / Q000627:therapeutic use*; D002648:Child; D002675:Child, Preschool; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D017589:Immunization Programs; D007115:Immunization Schedule; D007223:Infant; D007231:Infant, Newborn; D016896:Treatment Outcome; D014376:Tuberculosis / Q000453:epidemiology / Q000517:prevention & control*
D001500:BCG Vaccine