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Strong immunogenicity of heterologous prime-boost immunizations with the experimental vaccine GRAd-COV2 and BNT162b2 or ChAdOx1-nCOV19
Chiara Agrati; Stefania Capone; Concetta Castilletti; Eleonora Cimini; Giulia Matusali; Silvia Meschi; Eleonora Tartaglia; Roberto Camerini; Simone Lanini; Stefano Milleri; Stefano Colloca; Alessandra Vitelli; Antonella Folgori.
Afiliación
  • Chiara Agrati; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Stefania Capone; ReiThera srl
  • Concetta Castilletti; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Eleonora Cimini; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Giulia Matusali; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Silvia Meschi; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Eleonora Tartaglia; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Roberto Camerini; ReiThera srl
  • Simone Lanini; Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani IRCCS
  • Stefano Milleri; Centro Ricerche Cliniche di Verona srl
  • Stefano Colloca; ReiThera srl
  • Alessandra Vitelli; ReiThera srl
  • Antonella Folgori; ReiThera srl
Preprint en En | PREPRINT-MEDRXIV | ID: ppmedrxiv-21258961
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ABSTRACT
Here we report on the humoral and cellular immune response in eight volunteers who autonomously chose to adhere to the Italian national COVID-19 vaccination campaign more than 3 months after receiving a single administration GRAd-COV2 vaccine candidate in the context of the phase 1 clinical trial. We observed a clear boost of both binding/neutralizing antibodies as well as T cell responses upon receipt of the heterologous BNT162b2 or ChAdOx1-nCOV19 vaccines. These results, despite the limitation of the small sample size, support the concept that a single-dose of an adenoviral vaccine may represent an ideal tool to effectively prime a balanced immune response, which can be boosted to high levels by a single dose of a different vaccine platform.
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Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Prognostic_studies / Rct Idioma: En Año: 2021 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Prognostic_studies / Rct Idioma: En Año: 2021 Tipo del documento: Preprint