A STUDY ON THE EFFECT OF SIMULTANEOUS SMALLPOX VACCINATION ON THE RESULT OF PPD TEST.
D002648:Child; D002681:China; D006801:Humans; D012899:Smallpox; D012900:Smallpox Vaccine; D014373:Tuberculin; D014374:Tuberculin Test; D014611:Vaccination
D012900:Smallpox Vaccine; D014373:Tuberculin
CHILD; CHINA; SMALLPOX VACCINE; TUBERCULIN TEST