Our expert says:
One of the indications for a TB screening x/ray is a persistent cough for more than 4 weeks on medication. If you work in an environment where you could have a risk, I would advise you to rather go for a screening X/ray. Your doctor needs to re-evaluate you anyway as you may need a second course of antibiotics or treatment for a atypical bacteria. If you are feverish and if the phlegm is yellow or green it may be a good idea to send a sample to the lab for microscopy and culture to identify the germ.
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