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Oral delivery of a chitosan adjuvanted COVID-19 vaccine provides long-lasting and broad-spectrum protection against SARS-CoV-2 variants of concern in golden hamsters

VaccinationVaccine SafetyBroad-spectrum ProtectionGolden HamstersSars-cov-2 VariantsVaccine DevelopmentMucosal VaccinationImmunologyVirologyInfection ControlMedicineVaccine ResearchCovid-19