IOM conducts a variety of pre-departure immunization activities. For example, within the context of the US Refugee Admissions Program (USRAP), IOM has been working with CDC, the US State Department’s Bureau of Population, Refugees and Migration (PRM) and national immunization programmes to develop and implement a vaccination programme for United States-bound refugees since 2012. The programme aims to introduce vaccinations early in the resettlement process to ensure that refugees arrive in the United States protected against many of the common vaccine-preventable diseases. Since the beginning of the programme, over 177,000 refugees have been vaccinated in 18 countries. Overall, within IOM health assessment programmes, 27 operations in 22 countries are providing pre-departure vaccinations. MMR is the most common vaccination provided across locations, followed by hepatitis B, polio, varicella and DT/DTP/DTaP.