The founder of Microsoft has warned of bioterrorist attacks and has urged world leaders to use "germ games" to prepare for them.
Bill Gates said governments must get ready for future pandemics and smallpox terror attacks by investing billions in research and development.
During a sit-down interview with the chair of the Health Select Committee, Jeremy Hunt, for the think tank Policy Exchange, Mr Gates suggested "germ games" could be used to practise how to respond to such events.
He also called for the formation of a new billion-dollar World Health Organisation (WHO) Pandemic Task Force.