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Cell, 2021-11, Vol.184 (23), p.5699-5714.e11
2021
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Autor(en) / Beteiligte
Titel
Immunogenicity of standard and extended dosing intervals of BNT162b2 mRNA vaccine
Ist Teil von
  • Cell, 2021-11, Vol.184 (23), p.5699-5714.e11
Ort / Verlag
United States: Elsevier Inc
Erscheinungsjahr
2021
Quelle
MEDLINE
Beschreibungen/Notizen
  • Extension of the interval between vaccine doses for the BNT162b2 mRNA vaccine was introduced in the United Kingdom to accelerate population coverage with a single dose. At this time, trial data were lacking, and we addressed this in a study of United Kingdom healthcare workers. The first vaccine dose induced protection from infection from the circulating alpha (B.1.1.7) variant over several weeks. In a substudy of 589 individuals, we show that this single dose induces severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) neutralizing antibody (NAb) responses and a sustained B and T cell response to the spike protein. NAb levels were higher after the extended dosing interval (6–14 weeks) compared with the conventional 3- to 4-week regimen, accompanied by enrichment of CD4+ T cells expressing interleukin-2 (IL-2). Prior SARS-CoV-2 infection amplified and accelerated the response. These data on dynamic cellular and humoral responses indicate that extension of the dosing interval is an effective immunogenic protocol. [Display omitted] •BNT162b2 vaccine with an extended interval between doses is highly protective•Antibody levels were higher after the extended regimen compared with the short regimen•The extended regimen enriches for virus-specific CD4+ T cells expressing IL-2•Antibody levels wane after each dose, but B and T cell pools are maintained After giving a primary dose, delaying administration of a second dose of BNT162b2 COVID-19 vaccine up to 6–14 weeks continues to provide strong protection and contributes to favorable antibody, B cell, and T cell responses.

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