Uzbekistan and Kazakhstan reported the highest numbers of measles cases between April 2020-March 2021, with 446 and 423 cases respectively. Overall, 1,511 measles cases were reported in this period in the WHO European Region, with 96% occurring in the top 10 reporting countries. For rubella, 86 total cases were reported between April 2020-March 2021, with 97% found in the top 5 countries of Italy, Turkey, Germany, Ukraine, and Poland.