[Hidden focus:  principle factor in prevention of tuberculosis].
D035843:Biomedical Research; D006801:Humans; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary / Q000517:prevention & control*
TUBERCULOSIS, PULMONARY/prevention and control
Foyer inapparent:  principal facteur endémique dans la prophylaxie de la tuberculose.