Ongoing mumps outbreak among adolescents and young adults, Ireland, August 2018 to January 2020 Ferenczi, Annamaria and Gee, Sarah and Cotter, Suzanne and Kelleher, Kevin and on behalf of the Mumps Outbreak Control Team, Eurosurveillance, 25, 2000047 (2020), https://doi.org/10.2807/1560-7917.ES.2020.25.4.2000047