Ai Fen a Chinese doctor and director of the emergency department of Central Hospital of Wuhan. Came into contact with the first case of pulmonary infection showing “multiple patchy blurry shadows scattered in lungs” from a delivery person of Huanan Seafood Wholesale Market.

Ai Fen received a second patient, but this person had no history of contact of Huanan Seafood Wholesale Market. In the afternoon of 30 December, the test result of the second patient showed infection with a coronavirus. When she saw the words “SARS coronavirus, pseudomonas aeruginosa, 46 types of oral / respiratory colonisation bacteria” on the test sheet, Ai immediately reported to the hospital’s public health department and infection department.

She circled the word “SARS”, and took an image of it and sent it to a doctor at another hospital in Wuhan. From there it spread throughout medical circles in Wuhan, where it reached Li Wenliang, an ophthalmologist at the hospital. On the afternoon of the same day, Li sent a warning to former classmates over WeChat, which was reposted publicly in large numbers.