Volume 27, Number 12—December 2021
Evaluation of Early Warning, Alert and Response System for Ebola Virus Disease, Democratic Republic of the Congo, 2018–2020
|Alert system||Suspected case definition
||Total||% (95% CI)
|No. met||No. unmet||Sensitivity||Specificity||PPV||NPV|
|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.