(3) December 31: The NHC made arrangements in the small hours to send a working group and an expert team to Wuhan to guide its response to the situation and conduct on-site investigations.
The WCHC website carried its Information Circular on the Pneumonia Cases in Wuhan, confirming 27 cases and urging the public to stay away from enclosed public places with poor ventilation and venues where large crowds gathered. The commission also suggested the use of face masks when going out. From that day on, the WCHC began to release updates on the disease in accordance with the law.
(4) January 1, 2020: The NHC set up a leading group on the disease response. The next day, it formulated Guidelines on Early Detection, Early Diagnosis and Early Quarantine for Prevention and Control of Viral Pneumonia of Unknown Cause. The Chinese Center for Disease Control and Prevention (China CDC) and the Chinese Academy of Medical Sciences (CAMS) received the first batch of samples of four cases discovered in Hubei and began the pathogen identification process.
(5) January 3: The WCHC issued Information Circular on Viral Pneumonia of Unknown Cause, reporting a total of 44 cases.
Under the direction of the NHC, China CDC and three other institutions carried out parallel laboratory testing of the samples to identify the pathogen. The NHC and the Health Commission of Hubei Province jointly formulated nine documents, including Diagnosis and Treatment Protocol for Viral Pneumonia of Unknown Cause (for Trial Implementation).
From that day on, on a regular basis, China began to update the WHO, relevant countries, and regional organizations, as well as its own regions of Hong Kong, Macao and Taiwan, on the development of the disease.
(6) January 4: The head of China CDC held a telephone conversation with the director of the US CDC, briefing him about the new pneumonia. The two sides agreed to keep in close contact on information sharing and cooperation on technical matters.
The NHC and related health departments in Hubei Province produced Treatment Manual for Viral Pneumonia of Unknown Cause.
(7) January 5: The WCHC updated information on its website, reporting a total of 59 cases of the viral pneumonia of unknown cause. Laboratory tests ruled out respiratory pathogens as the cause, such as influenza, avian influenza, adenovirus, the Severe Acute Respiratory Syndrome coronavirus, and the Middle East Respiratory Syndrome coronavirus.
China sent a situation update to the WHO. The WHO released its first briefing on cases of pneumonia of unknown cause in Wuhan.
(8) January 6: The NHC gave a briefing on cases of pneumonia of unknown cause in Wuhan at a national health conference, calling for greater
