Our expert says:
They often take a sputum sample if they suspect the patient may have TB to send to the lab for culture and then the patient needs to go back after a few weeks to get the result before they are put on treatment. Just find out if this is what happened? The rest of the family can go to a local municipal clinic near you/their home for screening (just phone and find out which days they do TB screening - it is usually a mobile unit that comes round to do x/rays certain days of the month)
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