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Title: Influenza versus COVID-19 cases among influenza-like illness patients in travelers from Wuhan to Hong Kong in January 2020
Authors: Tao, J
Gao, H
Zhu, S
Yang, L 
He, D 
Issue Date: Dec-2020
Source: International journal of infectious diseases, Dec. 2020, v. 101, p. 323-325
Abstract: Objective: The COVID-19 outbreak in Wuhan, Hubei, China, followed the seasonal influenza epidemic. Since some COVID-19 cases may have been misdiagnosed as seasonal influenza in January 2020, before testing capacity was adequate, it is relevant to study the proportions of influenza and COVID-19 cases among influenza-like-illness (ILI) patients and their temporal pattern.
Results: This study analyzed the record of the ILI patients with a recent travel history to Wuhan who arrived in Hong Kong between 31 December 2019 and 21 January 2020. We found that the proportion of COVID-19 cases among the total ILI patients is much smaller than a study among ILI in Wuhan. This difference in proportion could be due to the difference in sampling. We argue that it is essential to consider both samples when inferring the number of COVID-19 cases from ILI patients.
Keywords: COVID-19
Hong Kong
Publisher: Elsevier
Journal: International journal of infectious diseases 
ISSN: 1201-9712
DOI: 10.1016/j.ijid.2020.09.1474
Rights: © 2020 The Authors. Published by Elsevier Ltd on behalf of International Society for Infectious Diseases. This is an open access article under the CC BY-NC-ND license ( nd/4.0/).
The following publication Tao, J., Gao, H., Zhu, S., Yang, L., & He, D. (2020). Influenza versus COVID-19 cases among influenza-like illness patients in travelers from Wuhan to Hong Kong in January 2020. International Journal of Infectious Diseases, 101, 323-325 is available at
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