Patient :I am a nurse. I tested positive for mantoux test, 25mm is the size of induration. I already undergone chest x-ray and it is normal. I am now taking isoniazid and rifamficin as prophylaxis. Just this week I submitted 1 sputum for afb and it tested positive. Does it mean that I am infectious? And does it mean that my latent TB infection had progressed already? Thanks
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