Delayed tuberculin boosting in the older population.
D000328:Adult; D005189:False Positive Reactions; D006801:Humans; D007538:Isoniazid / Q000627:therapeutic use; D008875:Middle Aged; D014374:Tuberculin Test / Q000379:methods / Q000592:standards*; D014376:Tuberculosis / Q000517:prevention & control
D007538:Isoniazid