Measles outbreak linked to European B3 outbreaks, Wales, United Kingdom, 2017

Abstract

The United Kingdom achieved interrupted endemic measles transmission for 36 months in 2016. Despite this, ongoing challenges from sporadic measles cases typically imported from abroad remain. We summarise a B3 measles genotype outbreak in south-east Wales occurring between May and September 2017, linked with other European outbreaks, and lessons learnt. Seventeen confirmed cases and one probable case occurred principally in education and health care settings. Six confirmed cases attended healthcare settings when infectious, without being isolated.