21-28 April is celebrated as World Immunisation Week The importance of immunisation in one's life cannot be stressed enough. It helps save million lives across the globe every year and helps build immunity against many deadly diseases. To create awareness about its importance and to encourage people to vaccinate their children WHO unites countries across the globe for a week of vaccination campaigns public education and information sharing under the umbrella of World Immunization Week. (Read: World Immunisation Week: 1 in 5 children worldwide miss out on basic vaccines) 1. Immunisation prevents between 2-3 million deaths every year Immunization prevents