3 February 2021 Vaccine- and vaccination-related crises require a communication response that is different from the communication strategies used to promote the benefits and importance of vaccines in general. This document presents the technical guidance needed to develop a communication plan that is appropriate for managing crises related to vaccine safety. This guidance will be useful for managers in the areas of immunization and vaccine and vaccination safety. They will also help preparedness and response teams working in safety crises to optimize their communication plans in order to regain, maintain, or strengthen trust in vaccines, vaccination, and immunization programs in general.