Zuckerberg and Chan aim to tackle all disease by 2100

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Facebook's founder Mark Zuckerberg and his wife Priscilla Chan have pledged $3bn (£2.3bn) to fund medical research over the next decade.

At a press conference in San Francisco, they said their ultimate goal was to "cure, prevent or manage all diseases by the end of the century".The funds will be distributed by the Chan Zuckerberg Initiative, which they created in December 2015.

Tech leaders are increasingly turning their attention to health.Earlier in the week, Microsoft said it intended to "solve" cancer by using artificial intelligence tools.

Google's DeepMind unit is working with the NHS to find a way to use computers to more accurately diagnose diseases.And IBM and MIT announced a tie-up earlier this week to develop AI-based systems that could help clinicians improve the care of elderly and disabled patients.

Biohub projects

He outlined three principles that will guide the couple's investments:

- to bring scientists and engineers together

- to build tools and technology that advance research

- to grow the movement to fund more science around the world