Maybe the short answer is: We need a better imagination?
The global health world hasn't set its goals high enough, hasn't dreamed big enough when it comes to stopping tuberculosis, says Dr. Paul Farmer, physician at Harvard Medical School and founder of the nonprofit Partners In Health.
"We've had a failure of imagination," he says. "We haven't had the same optimism, commitment and high ambitious goals around TB that we've seen around HIV. And what's the downside of setting high goals? I think it's very limited."