This manual will help field staff to mainstream HIV and AIDS in humanitarian emergencies. It assumes some knowledge of humanitarian programming, and is intended to build staff skills in addressing the underlying causes of vulnerability to HIV infection and the consequences of HIV and AIDS, particularly in rapid-onset emergencies. The authors draw on experience in the field and offer practical recommendations on how to make sure that HIV and AIDS is considered when responding to humanitarian crises. The book explains both how HIV affects emergencies and how emergencies affect HIV, as well as identifying the particular needs of potential vulnerable groups. There is guidance particularly for managers in the planning stage, but the book also suggests how to mainstream HIV and AIDS throughout the emergency project cycle. It includes useful checklists and planning tools, with examples of inductions, trainings, and awareness-raising sessions both for staff and for community members.