But experts warn that drugs alone will not win it, after the pharmaceutical giants agree to work together on an ambitious project.

Sexsomnia or sleep sex unravelled.

A so-called sleep school in Grenada teaches people the key to a perfect night’s rest.

Global warming has spread the tsetse fly, which carries sleeping sickness, down to Southern Africa, threatening tens of millions more people.

Compounds being developed against tuberculosis also show promise against deadly tropical diseases threatening millions of people.