Pneumonia of unknown etiology (PUE) surveillance system
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| Pneumonia of unknown etiology (PUE) surveillance system | |||||||
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| Traditional Chinese | 不明原因肺炎監測系統 | ||||||
| Simplified Chinese | 不明原因肺炎监测系统 | ||||||
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The pneumonia of unknown etiology (PUE) surveillance system is a Chinese monitoring system, established in response to the 2002–2004 SARS outbreak to track emerging respiratory infections, including avian flu and SARS. On 29 December 2019, local hospitals in Wuhan, Hubei Province, China, identified four closely related people, linked to a local wet market, as having a “pneumonia of unknown etiology” using the national system. Their illness was later confirmed as COVID-19 due to SARS-CoV-2.