On a Thursday morning last month, Boniaba Community Health Center in Mali was running a TB screening. There was no doctor in sight. Yet, a mother plagued by coughing got an answer in a matter of seconds: She was positive for TB.

A few years ago, she'd have been lucky if there was a screening nearby. And still, she'd have had to wait a week or two for a sputum test to be sent to a lab and results to come back.

The difference? A mobile x-ray machine and an AI algorithm are detecting TB. (In case you're not familiar with AI terminology — this is basically a computer program trained on a whole lot of data.)

TB is the world's top infectious disease killer — with 3,500 people dying of it each day for an annual total of more than 1.2 million deaths. And the numbers are going up. One of the

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