The World Health Organization's mission: to promote health, keep the world safe, and serve the vulnerable. Working through offices in more than 150 countries, WHO staff work side by side with governments and other partners to ensure the highest attainable level of health for all people. Stay connected with WHO: Facebook https://www.facebook.com/WHO Twitter http://www.twitter.com/who Instagram: @who Google+ https://www.google.com/+who YouTube http://www.youtube.com/who