Can tuberculosis be prevented?
Yes. You usually have to be in contact with someone with active TB for a long time before becoming infected. The most important measure to prevent the transmission of TB in the hospital is to have proper ventilation and/or proper personal protective equipment (respirator).
Some countries (but not the United States) use a TB vaccine called bacillus Calmette-Guerin (BCG). The vaccine has been shown to work better in children than in adults. It may also make skin tests for TB less accurate.