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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

Muhammad Ibaad Alvi, Merav Kliner, William Welfare, N. C. Gordon, Sherine J. Thomas, S. Padfield, Hannah E Emmett, E. Heinsbroek et al.

Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2025

9 citations

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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Evidence Hub reads this as a case series, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health.

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