Inconsistency of Timeliness in a Chief Complaint-Based Syndromic Surveillance System During Two Influenza Epidemic Seasons

Tao Tao, Qi Zhao, Jun Zong, Xue Li, Vinod Diwan, Biao Xu

Abstract


This study estimated the early warning timeliness of a chief complaint-based syndromic surveillance system towards seasonal influenza epidemics. Findings showed that the timliness of ILI data sources changed across two influenza epidemic seasons. ILI reported from different levels of health facilities and patient groups showed distinct timeliness towards influenza epidemics indicated by virus positive rate (VPR) from National Influenza Surveillance Network. The changes of dominant strains, clinical manifestations, population groups affected in different influenza seasons might account for this inconsistency.


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DOI: https://doi.org/10.5210/ojphi.v7i1.5758



Online Journal of Public Health Informatics * ISSN 1947-2579 * http://ojphi.org