Furin cleavage of SARS-CoV-2 Spike promotes but is not essential for infection and cell-cell fusion. - Papa, Guido; Mallery, Donna L.; Albecka, Anna; Welch, Lawrence G.; Cattin-Ortolá, Jérôme; Luptak, Jakub; Paul, David; McMahon, Harvey T.; Goodfellow, Ian G.; Carter, Andrew; Munro, Sean; James, Leo C. (PLoS Pathogens, 2021)