Monthly measles and rubella monitoring report, January 2018, https://ecdc.europa.eu/sites/portal/files/documents/Monthly%20measles%20and%20rubella%20monitoring%20report%20-%20JAN%202018.pdf][4: http://www.euro.who.int/en/media-centre/sections/press-releases/2018/europe-observes-a-4-fold-increase-in-measles-cases-in-2017-compared-to-previous-year][5: These estimates refer to children in the vaccination target group below 2 years of age, ECDC, unpublished.]
Monthly measles and rubella monitoring report, January 2018, https://ecdc.europa.eu/sites/portal/files/documents/Monthly%20measles%20and%20rubella%20monitoring%20report%20-%20JAN%202018.pdf][4: