Report of simultaneous measles outbreaks in two different health regions in Portugal, February to May 2017 : lessons learnt and upcoming challenges - Augusto, Gonçalo Figueiredo; Silva, Andreia; Pereira, Natália; Fernandes, Teresa; Leça, Ana; Valente, Paula; Calé, Etelvina; Aguiar, Bárbara Andreia; Martins, António; Palminha, Paula; Vinagre, Elsa; Cordeiro, Rita; et al. (2019)