You can avoid getting TB by staying away from people who have the disease. Sometimes this is not possible because you may work in a hospital, doctor’s office, nursing facility, prison, or homeless shelter where people have the disease. You may also be caring for a friend or family member who has the disease. To avoid TB in these situations:
Avoid long periods of time in enclosed rooms with someone who has TB.
Air out those rooms regularly.
Cover your face with a mask.
Anyone who is exposed to people who have TB disease should be tested for the disease.