Abstract: The present specification discloses broad-spectrum, pan-Coronavirus immunogenic composition including amino acid-based, broad-spectrum, pan-Coronavirus immunogenic compositions and nucleotide-based, broad-spectrum, pan-Coronavirus immunogenic compositions, methods and uses for preventing or treating a Coronavirinae-based infection or pathology as well as methods and uses of creating, maintaining or restoring antigenic memory to one or more Coronavirus species, strains, genotypes, subgenotypes, serotypes or genetic/antigenic lineages in an individual or population of individuals.