After the training, but before trained prison peer educators start their activities, the investigators will assess whether inmate peer educators are really capable of doing the expected activity. The investigators will make them teach a sample of trainees in front of trainers and will evaluate inmate peer educators using a checklist. Inmate peer educators will also be tested whether they are cable of identifying presumptive TB cases by providing them presumptive TB cases and non-presumptive TB cases and verifying their diagnosis by TB experts (trainers). Once they are tested for their capability, peer educators will organize inmates into groups and will provide education about TB, its prevention, and control every two weeks on a regular basis for one year. Peer educators will undertake routine TB screening using a standardized TB screening protocol to identify presumptive TB cases for a referral. Inmate peer educators will be provided with N95 masks to be used during the screening. Identified presumptive TB cases (those, at least, having had a cough for two weeks or more according to the recommendation of national TB guideline) will be referred by the prison health personnel to nearby hospitals.