Managing tuberculosis before the onset of symptoms.

Competing Interests: All authors are WHO staff members. The authors alone are responsible for the views expressed in this Comment and do not necessarily represent the views, decisions, or policies of WHO or other institutions with which they are affiliated. WHO receives funding from a diversified portfolio of donors (including the US Agency for International Development, The Bill & Melinda Gates Foundation, the US Centers for Disease Control and Prevention, European Respiratory Society, and Unitaid) to support meetings and other activities.