Measles outbreak after 12 years without endemic transmission, Portugal, February to May 2017 George, Francisco and Valente, João and Augusto, Gonçalo F and Silva, Andreia J and Pereira, Natália and Fernandes, Teresa and Palminha, Paula and Aguiar, Bárbara A and Martins, António and Santos, Estêvão and Valente, Paula and Calé, Etelvina and Leça, Ana and Nogueira, Paulo J, Eurosurveillance, 22, 30548 (2017), https://doi.org/10.2807/1560-7917.ES.2017.22.23.30548