[Tubercular allergy and change in the age-incidence of primary infection].
D002648:Child; D003141:Communicable Diseases; D006801:Humans; D006967:Hypersensitivity; D015994:Incidence; D007223:Infant; D014373:Tuberculin; D014374:Tuberculin Test; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary
D014373:Tuberculin
TUBERCULIN REACTION/in infancy and childhood; TUBERCULOSIS, PULMONARY/in infancy and childhood