In April 2011, upon request from the Greek Ministry of Health and Social Solidarity, a joint ECDC/WHO Regional Office for Europe mission was undertaken to Greece to assess the situation related to the increased migration at the Greek–Turkish border. The objective of the mission was to assist Greek health authorities in assessing the public health risks related to the increased migration and to communicable diseases in particular. This report describes the situation in detention centres and presents recommendations to improve the health condition of detained migrants and minimise the risk of communicable disease outbreaks.