every year. world tb day is highlighting the nearly 3 million people who don't have access to treatment. it's more common in poor areas where people live in close quarters. south africa has the highest rate of tb where it's the leading cause of death. but thousands of south africans are developing a tb resistant to antibiotics every year. doctors without borders is now trying a new way to treat patients. >> reporter: every day this man goes to his local clinic to be monitored for progress and take his medication. he has extreme drug-resistant tuberculosis, the worst kind there is because normal drugs don't work. he got his diagnosis, and was convinced it was his death sentence. >> you feel like okay.