the ratio of benefit ( reduction of risk for tuberculosis ) to risk ( for nonfatal isoniazid-related hepatitis ) was clearly favorable in persons who had definite conversions ( 1.6 for women , 3.4 for men ) but less so for persons who had tuberculin reactions of unknown duration and for persons with minor increases in size of tuberculin reaction ( less than 12 mm increase from an initially negative reaction ) .
C0041296
tuberculosis
C0022209
related