Active tuberculosis (TB) is very contagious. The World Health Organization (WHO) estimates that one-third of the world's population is infected with the bacteria that cause TB.
To avoid getting an active TB infection:
- Do not spend long periods of time in stuffy, enclosed rooms with anyone who has active TB until that person has been treated for at least 2 weeks.
- Use protective measures, such as face masks, if you work in a facility that cares for people who have untreated TB.
- If you live with someone who has active TB, help and encourage the person to follow treatment instructions.