On World Health Day (7 April), WHO is calling for urgent action to ensure that, at a time when the world's population is ageing rapidly, people reach old age in the best possible health.

In the next few years, for the first time, there will be more people in the world aged over 60 than children aged less than five. By 2050, 80% of the world’s older people will be living in low- and middle-income countries. (...)

The article:
http://www.who.int/mediacentre/news/releases/2012/whd_20120403/en/index.html

More about:
http://www.who.int/world-health-day/2012/en/

http://www.euro.who.int/en/who-we-are/whd/world-health-day-2012

Basic information:

http://en.wikipedia.org/wiki/World_Health_Day

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WHO - World Health Statistics 2011:

http://www.un-ngls.org/spip.php?article3886