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Volume 27, Number 12—December 2021
Synopsis

Evaluation of Early Warning, Alert and Response System for Ebola Virus Disease, Democratic Republic of the Congo, 2018–2020

Mory KeitaComments to Author , Héloïse Lucaccioni, Michel Kalongo Ilumbulumbu, Jonathan Polonsky, Justus Nsio-Mbeta, Gaston Tshapenda Panda, Pierre Celeste Adikey, John Kombe Ngwama, Michel Kasereka Tosalisana, Boubacar Diallo, Lorenzo Subissi, Adama Dakissaga, Iris Finci, Maria Moitinho de Almeida, Debarati Guha-Sapir, Ambrose Talisuna, Alexandre Delamou, Stephanie Dagron, Olivia Keiser, and Steve Ahuka-Mundeke
Author affiliations: Institute of Global Health, University of Geneva, Geneva, Switzerland (M. Keita, J. Polonsky, S. Dagron, O. Keiser); World Health Organization Regional Office for Africa, Brazzaville, Congo (M. Keita, A. Talisuna); European Centre for Disease Prevention and Control, Stockholm, Sweden (H. Lucaccioni, I. Finci); Ministère Provincial de la Santé, Goma, Democratic Republic of the Congo (M.K. Ilumbulumbu, M.K. Tosalisana); World Health Organization, Geneva (J. Polonsky, L. Subissi); Ministère de la Santé, Direction Générale de la Lutte contre la Maladie, Kinshasa, Democratic Republic of the Congo (J. Nsio-Mbeta, G.T. Panda, P.C. Adikey, J.K. Ngwama); Ministère de la Santé, Direction Régionale de la Sante du Plateau central, Ziniaré, Burkina Faso (A. Dakissaga); Centre for Research on Epidemiology of Disasters, Research Institute on Health and Society, Université Catholique de Louvain, Brussels, Belgium (M.M. de Almeida, D. Guha-Sapir); Africa Center of Excellence (CEA-PCMT), University Gamal Abdel Nasser, Conakry, Guinea (A. Delamou); Institut National de Recherche Biomédicale, Kinshasa (S. Ahuka-Mundeke)

Main Article

Table 2

Evaluation results and overall characteristics of Ebola virus disease alerts from EWARS, Democratic Republic of the Congo, August 5, 2018–June 30, 2020*

Alert system Suspected case definition
 Total % (95% CI)
No. met No. unmet Sensitivity Specificity PPV NPV
Validated 15,163 15,561 30,724
Invalidated 2,764 160,645 163,409
Total 15,245 184,104 194,133 84.6 (84.1–85.1) 91.2 (91.0–91.3) 49.4 (48.8–49.9) 98.3 (98.2–98.4)

*Total excludes 434 (0.2%) alerts that were not investigated and 201 (0.1%) alerts that could not be classified according to the case definition due to missing data. EWARS, Early Warning, Alert and Response System; NPV, negative predictive value; PPV, positive predictive value.

Main Article

Page created: October 22, 2021
Page updated: November 19, 2021
Page reviewed: November 19, 2021
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