evidence: Anita E Heywood, Measles: a re-emerging problem in migrants and travellers, Journal of Travel Medicine, Volume 25, Issue 1, 2018, tay118, https://doi.org/10.1093/jtm/tay118 [...] The resurgence of measles across Europe highlights the impact of ongoing insufficient two-dose coverage in affected countries. Ceccarelli and colleagues2 estimated a seroprevalence of measles IgG antibodies of 80–88% among recent migrants from the WHO African region, while sub-optimal, these rates are greater than WHO coverage estimates from the region and on par with coverage reported in some European receiving countries. Despite record numbers of migrants arriving in Europe, the contribution of migration on the current epidemiology of measles in Europe is minimal. However, immigrants from within and outside Europe are a growing population group and face barriers to accessing immunisation and other health services and strategies to reach migrant populations and provide catch-up immunisation are needed. [...] Assessment of the role of international travel and unauthorized immigration on measles importation to the United States† .