MBIO MBIO Evolutionary and phenotypic characterization of two spike mutations in European lineage 20E of SARS-CoV-2. Ruiz-Rodríguez P Francés-Gómez C Chiner-Oms A López MG Jiménez-Serrano S Cancino-Muñoz I Ruiz-Hueso P Torres-Puente M Alma Bracho M D’Auria G Martinez-Priego L Guerreiro M Montero-Alonso M Gómez MD Piñana JL González-Candelas F Comas I Marina A Geller R Coscolla M. Benito-Ruesca R Universidad de Zaragoza 2021 research-article