There is no risk of infection with tuberculosis (TB) during casual, short and single travel e.g. in a bus or train. Risk is bigger if you travel repeatedly in the same bus or train with the person who has TB disease. If you are flying and someone on the same flight has TB disease, persons on flights lasting 8 hours or longer are at greater risk than persons on shorter flights. At greatest risk are those who sit close to (two rows in front and behind) the person with TB. The authorities in charge of infectious diseases can find out who these persons are and contact them.