31 October 2013 -- Vectors are small organisms such as mosquitoes, bugs, ticks and freshwater snails, that can carry disease from person to person and place to place. They can put our health at risk, at home and when we travel. The World Health Day 2014 campaign focuses on some of the main vectors and the diseases they cause and what we can all do to protect ourselves. Check the site regularly for tools and materials that will help you prepare for your World Health Day activities.