At the control sites, there will not be involvement of inmate peer educators and no training will be provided. The TB screening and treatment activity will follow the existing referral system (self-referral to nearby hospitals). However, the prison personnel at these sites will be informed about the proposed intervention. The prison personnel will be informed that this is a trial and that the investigators don't know whether the intervention is effective or not. The investigators will also inform the prison personnel that other prison sites were selected by chance and the intervention will be implemented in the control prisons if the investigators found this trial effective and helpful. Moreover, the investigators will provide a standardized up-to-date referral protocol to the prison personnel at the control sites as in the intervention sites.