"This communication for immunization manual is designed to give step-by-step information on how to design and implement an immunization communication strategy. It guides the reader from creating messages and identifying potential communication barriers, to talking to the media and different stages of what happens during communicating in a crisis, offering tools and ideas on planning, implementing and evaluating a communications strategy, big or small. Taken into an account the current COVID-19 pandemic, a chapter on COVID-19 and crises communication has been included. This manual can be used as a step-by-step document where the reader can start from the first chapter and finish on the last. It can also be used as a guidance for a single action, be it arranging a press conference or looking at how to select target groups. The references to other documents give direction towards further reading. The steps and actions described in the manual are real life examples. The focus is on the how rather than the theories behind. However, to have an idea of theories behind practice, the main overarching theory is described briefly. Each chapter highlights examples of theories behind the tools, bringing in the importance of learning from previous successes, challenges, and failures." (Introduction)