Mpox clade Ib and clade IIb outbreak: epidemiological overview
The latest information on mpox clade Ib and clade IIb cases in the UK and mpox vaccine administration in England.
Updates to this page
- From:
- UK Health Security Agency
- Published:
- 21 June 2022
- Last updated:
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10 September 2026
Show all updates
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Added report for 10 September 2026.
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Added report for 6 August 2026.
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Added report for 9 July 2026.
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Added report for 11 June 2026.
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Added report for 7 May 2026.
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Added report for 9 April 2026.
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Added report for 5 March 2026.
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Added report for 12 February 2026.
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Added report for 8 January 2026.
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Added report for 11 December 2025.
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Updated 7 November 2025 report to include a further case of clade Ib diagnosed in the UK during October 2025.
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Added report for 7 November 2025.
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Added report for 9 October 2025.
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Added report for 11 September 2025.
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Added report for 7 August 2025.
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Added report for 10 July 2025.
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Added report for 5 June 2025.
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Added report for 8 May 2025.
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Added report for 10 April 2025.
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Added report for 6 March 2025.
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Added report for 6 February 2025 on mpox clade Ib and clade IIb cases in the UK and replaced previous reports from June 2022 to December 2024 on mpox clade IIb only with an archive link.
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Added report for 9 January 2025.
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Added report for 12 December 2024.
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Added report for 7 November 2024.
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Added report for 10 October 2024.
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Added report for 5 September 2024 and clarification that the reports focus on mpox clade IIb.
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Added report for 8 August 2024.
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Added report for 11 July 2024.
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Added report for 13 June 2024.
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Updated publication dates during the pre-election period.
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Added report for 9 May 2024.
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Added report for 4 April 2024.
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Added report for 7 March 2024.
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Added report for 8 February 2024.
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Added report for 11 January 2024.
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Added report for 7 December 2023.
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Added report for 3 November 2023.
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Added report for 5 October 2023.
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Added report for 7 September 2023.
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Corrections to the number of cases presented in Figure 1 and UK totals in Table 1 in the 23 August 2023 interim report.
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Added report for 23 August 2023 (interim update).
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Uploaded report for 3 August 2023.
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Uploaded report for 6 July 2023.
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Uploaded report for 1 June 2023.
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Uploaded report for 25 May 2023 (interim update).
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Uploaded report for 4 May 2023.
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Uploaded report for 6 April 2023.
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Uploaded report for 2 March 2023 and updated the publication dates.
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Uploaded report and data for 20 December 2022.
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Uploaded report and data for 13 December 2022
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Added report and data for 6 December 2022, and date for final publication.
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Added report and data for 29 November 2022.
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Added report and data for 22 November 2022.
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Added report and data for 15 November 2022.
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Added report and data for 8 November 2022.
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Added report and data for 1 November 2022.
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Added report and data for 25 October.
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Added report and data for week 42.
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Added report and data for 11 October 2022.
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Added report and data file for 4 October 2022.
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Added report and data for 27 September 2022.
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Added report and data for 20 September 2022.
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Added report and data for 13 September 2022.
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Added report and data for 6 September 2022.
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Added report and data for 30 August 2022.
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Added report and data for 23 August 2022.
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Added report and data for 16 August 2022.
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Added report and data for 9 August 2022.
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Added report for 5 August 2022.
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Added report for 2 August 2022.
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Added report for 29 July 2022.
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Added report for 26 July 2022.
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Added report for 22 July 2022.
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Added report for 19 July 2022.
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Added report for the 15 July 2022.
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Added report for 12 July 2022.
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Added report for 8 July 2022.
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Added report for 5 July 2022.
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Added report for 1 July 2022.
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Added report for 28 June 2022.
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Added latest overview.
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First published.
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Documents
Mpox outbreak: epidemiological overview, June 2022 to December 2024 (link to UK Government Web Archive)
https://webarchive.nationalarchives.gov.uk/ukgwa/20250129194727/https://www.gov.uk/government/publications/monkeypox-outbreak-epidemiological-overview
Details
From September 2026, this report contains the latest national figures for cases of clade Ib, clade IIb, clade not yet known, and recombinant clades of mpox in the UK.
From 11 June 2026, this report also presents data for mpox vaccine administration in England.
Previous reports from February 2025 to August 2026 include data for clade Ib and clade Ib only, with clade not yet known combined into clade IIb case counts.
Mpox is a re-emerging zoonotic infection, caused by the monkeypox virus (MPXV), that occurs mostly in West and Central Africa.
From 21 June 2022 to week ending 5 August 2022, this update was published twice a week (Tuesdays and Fridays) and replaced the news stories previously published 3 times a week. Between 9 August 2022 and 20 December 2022, this report was published weekly on Tuesdays with an accompanying data set showing mpox case numbers by region and upper tier local authority of residence.
From 2 March 2023 onwards, this report has been published monthly to provide the latest national figures for cases of mpox.
Please refer to the UK Health Security Agency (UKHSA) notifications of infectious diseases reports for weekly updates on laboratory-notified mpox cases in England and on notifications of clinically suspected mpox in England and Wales by region and local authority. Further details on the epidemiology are available in the mpox technical briefing.