The new coronavirus outbreak started in 2019.

Wuhan's first patient with new coronavirus pneumonia had an onset on December 12, 2019, after which patients with unexplained pneumonia appeared one after another in some medical institutions in Wuhan City, and after various related viral tests, a new type of coronavirus was detected on January 7, 2020, and pathogenic nucleic acid testing was completed on January 10, and on January 12, it was determined that the disease was novel coronavirus pneumonia.

Timeline of the novel coronavirus outbreak

December 12, 2019: First patient onset.

December 29, 2019: 27 patients with pneumonia similar to the unknown virus are identified.

December 30, 2019: A team of experts heads to Wuhan.

December 31, 2019: First public notification issued: of the 27 cases, 7 of them are in serious condition, the rest are stable and controllable, investigation of the South China Seafood City (beginning to suspect game), at this time, no obvious human-to-human transmission was detected, and no infection of medical personnel was found.

On the same day, Wuhan carried out a citywide epidemiological investigation.

January 3, 2020: second notification, expressed still as viral pneumonia, the number of patients increased to 44 cases, including 11 severe cases. The first mentions the start of etiologic tracing and the exclusion of common respiratory diseases such as influenza, avian influenza, and adenovirus infections.

January 5, 2020: the third notification, the number of patients increased to 59 cases, including 7 cases of severe disease. SARS (SARS) and Middle East Respiratory Syndrome (MERS) were ruled out, prompting the public to wear face masks and seek prompt medical attention if they have fever.

January 7, 2020: the fourth briefing, for the first time, the expression of viral pneumonia was changed to new coronavirus pneumonia (some sources pointed out that the virus was confirmed on January 11), with 41 cases, of which two had been discharged, seven were seriously ill, and there was the first death. There are still no cases of infection among the 419 health care workers involved at this time.

January 11, 2020: At 20:41 p.m., Caixin publishes a special article, "Wuhan's New Coronavirus Traced Back to Its Source," which directly refers to the description of the "coronavirus" and reveals that the dead man was a 61-year-old patient, and that other media outlets are lagging behind in their response time by roughly 1-2 days.

January 13, 2020: Announcement of the first confirmed case of an overseas patient, a tourist traveling from Wuhan, China, was diagnosed with the novel coronavirus on January 8 in Thailand, and was taken to a Thai hospital the same day.

January 16, 2020: In the previous January 10-15, there were no new cases of coronavirus pneumonia in Wuhan, including the entire A-share market was very quiet.

But later in the briefing, it was mentioned that on the day of the 16th, four new cases were reported in Wuhan, while a case was also confirmed in Japan, where a Chinese man in his thirties living in Kanagawa Prefecture had traveled to Wuhan previously and had developed symptoms of fever, but - he hadn't been to that seafood market.

January 17, 2020: 17 new cases of coronavirus pneumonia, once again attracting public attention, with Lupin Pharmaceuticals jumping 5.4% on the day. It's worth noting that these 17 cases were diagnosed because of the use of a new test kit, which really demonstrates China's speed at this point. At this point in time, the cumulative report of 62 cases of new coronavirus pneumonia, has been cured and discharged 19 cases, in the treatment of serious illness 8 cases, death 2 cases.

Also worth noting: of those 17 cases, nine were under 60 years old, eight were 60 years old and older, the youngest was 30 years old, and the oldest was 79 years old -- indirectly suggesting that the frail may be more susceptible to the virus.

January 18/19, 2020: 59 new cases on the 18th, 77 new cases on the 19th, and 136 new confirmed cases on both days***. The numbers show some signs of an outbreak, and for the first time, there is no mention of "limited human-to-human transmission" and "low risk of sustained human-to-human transmission".

January 20, 2020: Lubrizol and a series of related markers go up in one word after a weekend of continued fermentation. South Korea has found its first confirmed case of the novel coronavirus, following two cases in Thailand and one in Japan.

Domestic has been Beijing, Shenzhen, Guangdong Province, new coronavirus pneumonia cases, and in Wenzhou, Zhejiang Province, Zhoushan, Taizhou, Hangzhou has found five cases of Wuhan, Zhejiang and fever and other respiratory symptoms of patients but not confirmed.

In the evening of January 20, 2020, Zhong Nanshan academician accepted CCTV live interview, mentioned:

1, confirmed that the virus human-to-human transmission phenomenon.

2, the virus is more likely to come from wild game.

3, wearing a mask to prevent is very important, general surgical masks can also block most of the virus sticking to the droplets into the respiratory tract.

4, For the first time, it was acknowledged that there was a contagion of 14 health care workers.

5. Viral infections are in the climbing stage, but are not as contagious compared to SARS.

January 23, 2020, Wuhan City, Hubei Province, new coronavirus infection epidemic prevention and control headquarters issued a notice, the city's buses, subways, ferries, long-distance buses to suspend operations, there is no special reason for the public can not leave Wuhan, at the same time, the airport, train stations away from the Han channel is temporarily closed. The restoration time will be announced separately.