I'll say something Pam would say. Theoretically, yes, the treatment is known. TB is curable, and 98% of people who take their medication will be cured, everything else aside. If you give treatment to people who were contacts, positive tuberculin reactors, and they take their medication, they will not get tuberculosis in the future. So the answer is theoretically yes. The problem is the administration and setting it up in the field.
On April 20th, 2010. See this statement in context.