Confirmed cases of mpox clade Ib in United Kingdom

Current confirmed cases

As of 2027 January 2025, the UK Health Security Agency (UKHSA) has confirmed 67 cases of clade Ib mpox in the UK.

The first case was reported on 30 October 2024 with 3 further household contact cases confirmed. A fifth, unrelated travel-associated case was reported on 29 November 2024.

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Methods and definitions

A confirmed mpox case is defined as a person with a laboratory-confirmed infection following a polymerase chain reaction (PCR) test.

Mpox surveillance data in England is based on mpox virus test results from the Rare and Imported Pathogens Laboratory (RIPL), which is the UKHSA mpox reference laboratory, and other UK laboratories with mpox testing.

Any counts of confirmed cases in Wales, Northern Ireland, and Scotland will be submitted to UKHSA by Public Health Wales, Public Health Agency Northern Ireland, and Public Health Scotland respectively.

Further information and advice

See GOV.UK for further information on the background of these clades.

UKHSA has published a range of guidance and advice on the epidemiology, symptoms, diagnosis, and management of mpox virus infections as well as technical reports and risk assessments.

Related routine statistics

The UKHSA publishes routine monthly updates on clade IIb mpox cases in the UK.