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Case series of the first five human infections with monkeypox virus clade Ib and report on the public health response, United Kingdom, October to November 2024
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Muhammad Ibaad Alvi1
,
Merav Kliner1
,
William Welfare1
, N Claire Gordon1
, Sherine Thomas1 , Simon Padfield1 , Hannah E Emmett1
, Ellen Heinsbroek1
, Gareth J Hughes1
, Natalie Groves1
, Eileen Gallagher1
, Steven Pullan1 , Amy Belfield1
, Catherine F Houlihan1,9,10
, Tommy Rampling1,9,10,11
, Geraldine O’Hara1,4 , Anne Tunbridge2 , Jake Dunning3
, Elizabeth Whittaker5
, Alejandra Alonso6 , Mike Beadsworth7 , Brendan AI Payne8 , Meera Chand1 , Susan Hopkins1
, Gillian Armstrong1
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View Affiliations Hide AffiliationsAffiliations: 1 United Kingdom Health Security Agency on behalf of the UKHSA IMT, London, United Kingdom 2 Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom 3 Royal Free London NHS Foundation Trust, London, United Kingdom 4 Guy’s and St Thomas’s NHS Foundation Trust, London, United Kingdom 5 Imperial College Healthcare NHS Trust, London, United Kingdom 6 Evelina London Children’s Hospital, London, United Kingdom 7 Liverpool Foundation Trust, on behalf of the NHS Airborne HCID Network, Liverpool, United Kingdom 8 Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle, United Kingdom 9 University College London, London, United Kingdom 10 University College London Hospital NHS Foundation Trust, London, United Kingdom 11 National Institute for Health and Care Research (NIHR) University College London Hospitals Biomedical Research Centre (BRC), London, United KingdomMuhammad AlviMuhammad.alvi nhs.net
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View Citation Hide Citation
Citation style for this article: Alvi Muhammad Ibaad, Kliner Merav, Welfare William, Gordon N Claire, Thomas Sherine, Padfield Simon, Emmett Hannah E, Heinsbroek Ellen, Hughes Gareth J, Groves Natalie, Gallagher Eileen, Pullan Steven, Belfield Amy, Houlihan Catherine F, Rampling Tommy, O’Hara Geraldine, Tunbridge Anne, Dunning Jake, Whittaker Elizabeth, Alonso Alejandra, Beadsworth Mike, Payne Brendan AI, Chand Meera, Hopkins Susan, Armstrong Gillian. Case series of the first five human infections with monkeypox virus clade Ib and report on the public health response, United Kingdom, October to November 2024. Euro Surveill. 2025;30(10):pii=2500131. https://doi.org/10.2807/1560-7917.ES.2025.30.10.2500131 Received: 24 Feb 2025; Accepted: 12 Mar 2025
Abstract
We report two importations of monkeypox virus clade Ib infection to the United Kingdom in 2024. The first was a traveller returning from Tanzania, Rwanda and Uganda, the second from Uganda. Both presented with fever and typical skin lesions; 147 contacts were followed up, 19 vaccinated with MVA-BN. Three household contacts of the first individual, including two children, became infected. These are the first reported autochthonous transmissions of clade Ib in Europe, and first paediatric cases outside the African continent.

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