The need for cohesion in the developing specialty of travel medicine is in response to the needs of travellers for expert advice, the increase in travel-related illness, and the increasing importance of epidemiology as a basis for the provision of evidence-based prophylactic advice and treatment. Topics covered in this text include emerging infections and their relation to travel; psychological aspects of travel and the long-term expatriate; refugees, disaster relief and migration; ethnic minority and immigrant travellers; and the impacts of tourism on host countries.