From the World Health Organization (WHO):
The theme of World Immunization Week 2015 is “Close the Immunization Gap.” The gap between the 1 in 5 children who still do not receive basic life-saving vaccines, as well as to the gaps in progress towards the targets set by the Global Vaccine Action Plan (GVAP). The GVAP envisions a world where everyone lives life free from vaccine preventable diseases – whoever they are, wherever they live – by 2020.