Immunogenicity, safety, and reactogenicity of heterologous COVID-19 primary vaccination incorporating mRNA, viral-vector, and protein-adjuvant vaccines in the UK (Com-COV2): a single-blind, randomised, phase 2, non-inferiority trial. - Stuart, Arabella S V; Shaw, Robert H; Liu, Xinxue; Greenland, Melanie; Aley, Parvinder K; Andrews, Nick J; Cameron, J C; Charlton, Sue; Clutterbuck, Elizabeth A; Collins, Andrea M; Darton, Tom; Dinesh, Tanya; et al. (Lancet, 2022)