I got a postive mantoux test back in the late 90s while getting my immunisations for nursing. I was required to get a CXR which was clear. Since then I had another mantoux test, also positive and another CXR after moving to NSW and working over there. Returned to WA, another CXR, should not get anymore mantoux test as the reaction will continue getting bigger. Have been told to watch out for developing symptoms as TB can lie dormant for years. Never needed to be treated, never needed the immunisation, it leaves a nasty scar.