Clinical development of the COVID-19 vaccine candidate ChAdOx1 nCoV-19, a replication-deficient simian adenoviral vector expressing the full-length SARS-CoV-2 spike (S) protein was initiated in April 2020 following non-human primate studies using a single immunisation. Here, we compared the immunogenicity of one or two doses of ChAdOx1 nCoV-19 in both mice and pigs. Whilst a single dose induced antigen-specific antibody and T cells responses, a booster immunisation enhanced antibody responses, particularly in pigs, with a significant increase in SARS-CoV-2 neutralising titres.
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Evaluation of the immunogenicity of prime-boost vaccination with the replication-deficient viral vectored COVID-19 vaccine candidate ChAdOx1 nCoV-19
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Contributors:
Graham S P, McLean R K, Spencer A J, Belij-Rammerstorfer S, Wright D, Ulaszewska M, Edwards J C, Hayes J W P, Martini V, Thakur N, Conceicao C, Dietrich I, Shelton H, Waters R, Ludi A, Wilsden G, Browning C, Bialy D, Bhat S, Stevenson-Leggett P, Hollinghurst P, Gilbride C, Pulido D, Moffat K, Sharpe H, Allen E, Mioulet V, Chiu C, Newman J, Asfor A S, Burman A, Crossley S, Huo J, Owens R J, Carroll M, Hammond J A, Tchilian E, Bailey D, Charleston B, Gilbert S C, Tuthill T J, Lambe T
Year: 2020
Citation: npj Vaccines 5 (1), 69
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