Meeting the Immunization Needs of the Urban Poor

Rapid urbanization presents an urgent challenge for the world’s low- and middle-income countries. More than half of world’s population (3.9 billion) now lives in a city; by 2050, this number will skyrocket to 6.3 billion, with 90 percent of growth occurring in low- and middle-income countries. The first step to meeting the immunization needs of the urban poor is revealing the obstacles to vaccine access.