Hi doctor, recently i had a chest xray as part of Australian Tourist visa medical test and diagnosed with homogenous opacity. Doctor gave me an antibiotic course which I have completed and have done another xray which came out with a little spot. Now I have to undergo 2- month long sputum test. I am under the process now. In the mean time, i have done another quick sputum test. The result found no AFB. I am 75 year old male, however do not have any symptom of coughing, cold , sweating or an thing else. I am completely doing fine healthwise. Could you please advise if I am carrying a TB germ? Many thanks.