The World Health Organization says passengers who sit still for four or more hours face a greater risk of developing blood clots.

VOA: special.2009.07.14

The World Health Organization aims to reduce by half the number of people who die from tuberculosis by the year 2015.

VOA: standard.2010.07.12

There are no reported cases outside the country, according to the World Health Organization (WHO).

BBC: China bird flu: Beijing reports its first case

Latest figures from the World Health Organization (WHO) show the virus has killed 6, 750 people worldwide.

CNN: The Hajj: A perfect storm for swine flu?

Six people have died, and the World Health Organization (WHO) said a further 8 cases were "severe".

BBC: China closes Nanjing market over H7N9 bird flu