The economic impact of vaccine-preventable diseases and of immunization is the second most common theme in messaging used by advocates behind direct morbidity and mortality. Within the topic, however, economic impacts are measured in a great variety of ways that are applied by advocates to a wide array of settings. The Economics topic of VoICE covers system- or national-level measures such as cost-effectiveness, productivity loss and return on investment. We also look at the ways in which poverty and costs of illness are influenced by vaccine-preventable diseases and averted by vaccines, both nationally and for individuals and their families. But in French.