Official Statistics

Changes to reporting over the summer period 2025 (starting from the week 23 report)

Updated 5 June 2025

Applies to England

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This publication is available at https://www.gov.uk/government/statistics/national-flu-and-covid-19-surveillance-reports-2024-to-2025-season/changes-to-reporting-over-the-summer-period-2025-starting-from-the-week-23-report

Starting from the week 23 report (covering data up to week 22), this surveillance report will be moving to a scaled-back summer report and released once every 2 weeks.

This change reflects the fact that there is typically lower respiratory virus activity in the summer period. This means that detailed disaggregation by population subgroups may not be possible, and some data collections are paused or scaled down to reduce the burden on contributors. This follows the reporting pattern of the National Influenza report prior to the COVID-19 pandemic period.

Summary of changes to the main report by section

Laboratory surveillance

Laboratory confirmed cases

Kept:

  • Figure 2. Daily percentage of tests positive for SARS-CoV-2 among all reported SARS-CoV-2 tests (7-day rolling average), England 2022 to present

  • Figure 4. Daily percentage of tests positive for influenza among all reported influenza tests (7-day rolling average), England

Removed:

  • Figure 1. Weekly confirmed COVID-19 episodes tested in hospital settings, England

  • Figure 3. Daily percentage of tests positive for SARS-CoV-2 among all reported SARS-CoV-2 tests by age group (7-day rolling average), England

  • Figure 5. Daily percentage of tests positive for influenza among all reported influenza tests by age group (7-day rolling average), England

Respiratory DataMart System

Kept:

  • Figure 6a. Respiratory DataMart weekly percentage of tests positive for influenza, SARS-CoV-2, RSV and rhinovirus, England

  • Figure 6b. Respiratory DataMart weekly percentage of tests positive for adenovirus, hMPV and parainfluenza, England

Removed:

  • Figure 7. Respiratory DataMart weekly cases by influenza subtype, England

  • Figure 8. Respiratory DataMart weekly percentage testing positive for RSV by season, England

  • Figure 9. Respiratory DataMart weekly percentage testing positive for RSV by age, England

SARS-CoV-2 lineages

Kept:

  • Figure 10. Prevalence of SARS-CoV-2 lineages amongst available sequenced cases for England from [day month year] to [day month year]

Influenza virus characterisation

This section has been removed.

Influenza virus antigenic characterisation

This section has been removed.

Influenza virus antiviral susceptibility surveillance

This section has been removed.

Community surveillance

Acute respiratory infection incidents

This section has been removed.

FluSurvey

This section has been removed.

Flu Detector

This section has been removed.

Syndromic surveillance

This section has been removed.

Primary care surveillance

Royal College of General Practitioners (RCGP)

Kept:

  • Figure 18. Number of samples tested for respiratory viruses in England by week, GP sentinel swabbing scheme

Removed:

  • Figure 17. RCGP ILI consultation rates per 100,000, all ages, England

  • Figure 19. Percentage of detected respiratory virus among all samples with completed testing in England by week, GP sentinel swabbing scheme

  • Figure 20. Percentage of detected respiratory viruses among all samples with completed testing in England by age group, GP sentinel swabbing scheme, week 15 to week 18

  • Figure 21. Weekly positivity for SARS-CoV-2, influenza and RSV in England, GP sentinel swabbing scheme

Secondary care surveillance

COVID-19, SARI Watch

Kept:

  • Figure 22. Weekly overall COVID-19 hospital admission rates per 100,000 trust catchment population reported through SARI Watch mandatory surveillance, England

  • Figure 24. Weekly overall COVID-19 ICU or HDU admission rates per 100,000 trust catchment population reported through SARI Watch mandatory surveillance, England

Removed:

  • Figure 23. Weekly hospital admission rate by age group for new COVID-19 positive cases reported through SARI Watch mandatory surveillance, England

  • Figure 25. Weekly ICU or HDU admission rate by age group for new COVID-19 positive cases reported through SARI Watch mandatory surveillance, England

Influenza, SARI Watch

This section has been removed.

RSV admissions, SARI Watch

This section has been removed.

ECMO, SARI Watch

Figure 36. Laboratory confirmed ECMO admissions in adults (COVID-19, influenza and non-COVID-19 confirmed) to severe respiratory failure centres in the UK removed but text will remain.

Vaccine coverage

COVID-19 vaccine uptake in England

Kept:

  • Figure 37. Cumulative weekly COVID-19 vaccine uptake by target group in England

International update

This section has been added.

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