When I have arrested people who have TB I have always noticed that they have a very hard, deep cough with lots of phlegm. We always carry paper masks with us for both them and us and sanitize thoroughly after contact.

webmd.com/hw/infection/hw2073… this will help you
best wishes

A deep, booming cough, coughing up blood, weight loss, night sweats. Don't expose yourself to this person without a mask, and remember that those paper surgical masks lose effectiveness after 30 minutes; you'll have to put on a new one. if you've been exposed to this person, you should have a TB skin test done. if it has a positive reaction, you'll need to get a chest x-ray to determine if you have active disease. if this 20 year old doesn't take their full course of medicine, it could rebound as an antibiotic resistant strain of the disease. Also, please be aware that TB germs can live in and float through the air for several hours. good luck!