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Volume 31, Number 5—May 2025
Synopsis

Outbreak of Marburg Virus Disease, Equatorial Guinea, 2023

Stephanie NgaiComments to Author , Egmond Samir Evers, Angela Katherine Lao Seoane, George Ameh, Julienne N. Anoko, Céline Barnadas, Mary J. Choi, Janet Diaz, Luca Fontana, Pierre Formenty, Ingrid Hammermeister Nezu, Frédérique Jacquerioz, John Klena, Henry Laurenson-Schafer, Olivier le Polain de Waroux, Anaïs Legand, Raquel Medialdea Carrera, Tatiana Metcalf, Joel Montgomery, Silvia Morreale, María E. Negrón, Justino Obama Nvé, Mitoha Ondo’o Ayekaba, Boris I. Pavlin, Trevor Shoemaker, Yaimara Torres Hernandez, Mabel Varona Venta, Emily Z. Gutierrez, Florentino Abaga Ondo Ndoho, and on behalf of the Marburg Virus Disease Outbreak Response Working Group1
Author affiliation: World Health Organization, Geneva, Switzerland (S. Ngai, E.S. Evers, A.K. Lao Seoane, G. Ameh, J.N. Anoko, C. Barnadas, J. Diaz, L. Fontana, P. Formenty, I. Hammermeister Nezu, H. Laurenson-Schafer, O. le Polain de Waroux, A. Legand, R. Medialdea Carrera, T. Metcalf, S. Morreale, B.I. Pavlin, Y. Torres Hernandez); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (M.J. Choi, J. Klena, J. Montgomery, M.E. Negrón, T. Shoemaker, E.Z. Gutierrez); Hôpitaux Universitaires de Genève, Geneva (F. Jacquerioz); Ministerio de Sanidad y Bienestar Social, Malabo, Equatorial Guinea (J.O. Nvé, M. Ondo’o Ayekaba, F. Abaga Ondo Ndoho); Brigada Médica Cubana, Malabo (M. Varona Venta).

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Figure 3

Chain of transmission of Marburg virus disease cases, by date of symptom onset and district, Equatorial Guinea, December 2022–April 2023. Where date of symptom onset was unavailable (1 case), estimated date of sample collection was used. Cases are labeled by sex and age in years. Solid black lines indicate known contact links suspected to be associated with transmission events. A degree of uncertainty is associated with some links shown. In the context of epidemiologically linked clusters with numerous contact links, infector–infectee pairs could not be determined in some cases. Boxes around cases indicate groups of cases with known epidemiologic links (i.e., clusters).

Figure 3. Chain of transmission of Marburg virus disease cases, by date of symptom onset and district, Equatorial Guinea, December 2022–April 2023. Where date of symptom onset was unavailable (1 case), estimated date of sample collection was used. Cases are labeled by sex and age in years. Solid black lines indicate known contact links suspected to be associated with transmission events. A degree of uncertainty is associated with some links shown. In the context of epidemiologically linked clusters with numerous contact links, infector–infectee pairs could not be determined in some cases. Boxes around cases indicate groups of cases with known epidemiologic links (i.e., clusters).

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1Members of this group are listed at the end of this article.

Page created: March 12, 2025
Page updated: April 03, 2025
Page reviewed: April 03, 2025
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