World Health Day (April 7 annually) - 2012 theme & definitions

from WHO (World Health Organization) website:

World Health Day - 7 April

Every year, World Health Day is celebrated on 7 April to mark the anniversary of the founding of WHO in 1948. Each year a theme is selected for World Health Day that highlights a priority area of concern for WHO.
World Health Day is a global campaign, inviting everyone – from global leaders to the public in all countries – to focus on a single health challenge with global impact. Focusing on new and emerging health issues, World Health Day provides an opportunity to start collective action to protect people's health and well-being.
www.who.int/world-health-day/en/

Good health adds life to years: Global brief for World Health Day 2012

http://www.who.int/ageing/publications/whd2012_global_brief/en/index.html