eLife assessment
Silva and colleagues present useful findings related to the isolation of an anti-S2 antibody that recognizes a previously uncharacterized SARS-CoV2 Spike (S) epitope, adding to the growing repertoire of anti-S antibodies that broadly cross-react against human and zoonotic coronaviruses. The evidence supporting the claims of the authors is solid, although antibody effectiveness as a prophylactic or therapeutic reagent in an animal model would have strengthened the study. The work will be of interest to biologists working to develop pan-coronavirus therapies.