Question to the Department of Health and Social Care:

To ask Her Majesty's Government whether they have plans to publicise findings from the SIREN study, and data from this and other studies about the protective effects against reinfection and serious illness of infection-acquired immunity (unboosted by vaccination).

Scientific papers and reports from the SIREN study are being publicised online through the UK Health Security Agency (UKHSA) and in scientific journals. In addition, the study’s participant retention programme includes regular webinars, newsletters and videos to share its results and findings.

On 22 July 2022, the UKHSA published SARS-CoV-2 variants of concern and variants under investigation in England Technical briefing 44 with data on trends in primary infections and reinfections. A copy of the technical briefing is attached.

The Office for National Statistics’ COVID-19 Infection Survey publishes analysis on re-infections and the associated risk factors and symptoms. An updated assessment, Coronavirus (COVID-19) Infection Survey, characteristics of people testing positive for COVID-19, UK: 20 July 2022. Characteristics of people testing positive for COVID-19 from the Coronavirus (COVID-19) Infection Survey, was published on 20 July 2022. A copy of the assessment is attached.