In the worst case scenario, more than 1.3 million people would die from tuberculosis.
Drug resistance threatens recent gains against the disease—but research shows there's reason to be optimistic.
"I hate the word 'cure' because it means something different to everybody," one of the researchers said. "But I think it's a major advancement.... It has simplicity."
The respiratory disease can be deadly if left untreated.
Nearly 100 million children are infected with tuberculosis, which causes 2 million deaths each year.
Health officials are tracking down airplane passengers who may have had direct contact with the woman.
Health workers have confirmed one case of tuberculosis among those who tested positive for infection.