Now online! The cryo-EM structures of Andes hantavirus (ANDV) glycoprotein tetramers, dimers of tetramers, and ADI-65534 Fab complexes on eVLPs unveil the molecular basis of New World hantavirus glycoprotein architecture, acid-induced membrane fusion, and antibody-mediated neutralization. Immunization with repRNA encoding ANDV-VLPs elicits high neutralizing-antibody titers.