The following tips help keep people around active TB patients from getting sick:

Finish the entire course of medication. This is the most important step to protect the patient and others from tuberculosis. (When you stop treatment early or skip doses, TB bacteria have a chance to develop mutations that allow them to survive the most effective TB drugs.
Vaccinations (In countries where tuberculosis is more common, infants often are vaccinated with bacille Calmette-Guerin (BCG) vaccine.)
Chemoprophylaxis (Drug treatment for TB prevention.)

Prevention in the household

Finish the entire course of medication. This is the most important step to protect the patient and others from tuberculosis. (When you stop treatment early or skip doses, TB bacteria have a chance to develop mutations that allow them to survive the most effective TB drugs.

Vaccinations (In countries where tuberculosis is more common, infants often are vaccinated with bacille Calmette-Guerin (BCG) vaccine.)