There are two answers to that question. One is drug-sensitive TB, which is curable at a relatively low cost and has a tolerable treatment.
This is possible for drug-resistant TB, although with the current regimen we have available we're just not able to give that treatment to everybody who needs it. As a result, we see an increasing rate of drug-resistant TB amongst the total amount of TB cases in many countries around the world. Some countries are worse than others, specifically in eastern Europe and central Asia, and India as well. In some countries you can buy TB drugs over the counter. People with a cough will go into a pharmacy, buy these pills to make their cough better, and in the process contribute to the development of drug-resistant TB.