"In the first days of the epidemic in Wuhan, cases were identified on the basis of clinical features, including fever and acute respiratory symptoms, radiology and epidemiological features. An association with the Huanan market was identified among some of the earliest recognized cases and, for a short period until mid-January 2020, exposure to the Huanan market was included in the case definition. It rapidly became clear, however, that there were cases without a link to the Huanan market, and this element of the definition was dropped a few days after being introduced (Annex E3)."
"In the first days of the epidemic in Wuhan, cases were identified on the basis of clinical features, including fever and acute respiratory symptoms, radiology and epidemiological features. An association with the Huanan market was identified among some of the earliest recognized cases and, for a short period until mid-January 2020, exposure to the Huanan market was included in the case definition. It rapidly became clear, however, that there were cases without a link to the Huanan market, and this element of the definition was dropped a few days after being introduced (Annex E3)."