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By Sergio Ferrer Pérez for The Conversation, Last year we left our protagonists, the entire population of planet Earth, cornered by a new coronavirus. They seemed on the verge of being defeated by the Covid-19 pandemic when the first vaccines arrived. Just as 2020 was ending, the first doses began to be injected into the arms of some lucky ones. Was this the beginning of the

Sergio ferrerManuel jimTeresa tejedorUniversity of barcelona carolina domComplutense university of madridUniversity of navarra ignacioKing college london josUniversity of huelva ivLas palmas de gran canaria marSalvador peirCollege london josComplutense universityBarcelona carolina domCoronavirus vaccineCovid 19Orld news