question: Hi doctor, During fitness examination I got know that I have bilateral apical pleural thickening in the chest x-ray, but neither in the past or current, I have any health complaints. So, the further investigation I did was PPD skin test and QuantiFERON TB gold test, which is positive 20 mm and 3.42 IU respectively. Kindly advised me if that is suggestive of TB infection. Do I need take anti-tubercular medicine? I am working right now in abroad. Can I prevent this from becoming active?