The world is “sleepwalking towards disaster” because of preventable illnesses such as heart disease, cancer and diabetes, which kill 40 million people a year.

That’s the message from World Health Organization Director-General Dr Margaret Chan, who’s stepping down after 10 years in the post.

At WHO, the person leading the push against these so-called non-communicable diseases is Dr Doug Bettcher; he told Daniel Johnson what’s at stake.

Duration: 4'14"