Research and analysis

ONS: Impact of Delta and calendar time on vaccine effectiveness against new SARS-CoV-2 infection and Ct/viral burden in infections post-vaccination – preliminary analysis on data (to 12 July 2021), 22 July 2021

Paper prepared by the Office for National Statistics (ONS).

Documents

ONS: Impact of Delta and calendar time on vaccine effectiveness against new SARS-CoV-2 infection and Ct/viral burden in infections post-vaccination – preliminary analysis on data (to 12 July 2021), 22 July 2021

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Details

Paper from ONS on the Delta variant of concern. It was considered at SAGE 94 on 22 July 2021.

The paper is the assessment of the evidence at the time of writing. As new evidence or data emerges, SAGE updates its advice accordingly.

This paper was previously published on the Nuffield Department of Medicine website.

To support this, ONS have published a blog post on the Delta variant and vaccine effectiveness giving an overview of what the Coronavirus Infection Survey can tell us.

These documents are released as pre-print publications that have provided the government with rapid evidence during an emergency. These documents have not been peer-reviewed and there is no restriction on authors submitting and publishing this evidence in peer-reviewed journals.

Updates to this page

Published 19 August 2021
Last updated 20 August 2021 + show all updates
  1. This paper was released as part of a batch of SAGE documents on 20 August 2021.

  2. First published.

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