Conflict and forced migration – resulting in disruption of communities and health systems – amplify the risk factors for infectious disease and increase the urgency of preventive measures such as immunization. While disease outbreaks of measles, cholera, meningitis and even polio in refugee camps may be the most widely covered issues related to immunization in conflict-affected areas and populations, this VoICE Featured Issue explores some of the less-visible, but equally critical aspects. Immunizations play an important role in these settings, considering the threat of malnutrition and antimicrobial resistance, economic pressures, and the urgent need for responsive policies.